Wireless connection between dvd & audio system?
 

I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

Many thanks in advance.

- Tom Bennett
Brentwood

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 11:04:43 -0000, "Tom Bennett"
wrote:

I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

There are RF links for this task but only if you are willing to suffer
substantial deterioration of the signals. Best options are cable,
move the DVD and/or move the HiFi.

Kal

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 11:04:43 -0000, "Tom Bennett"
wrote:

I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

There are RF links for this task but only if you are willing to suffer
substantial deterioration of the signals. Best options are cable,
move the DVD and/or move the HiFi.

Kal

Wireless connection between dvd & audio system?
 

In article , Kalman Rubinson
writes
On Sat, 6 Dec 2003 11:04:43 -0000, "Tom Bennett"
wrote:

I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

There are RF links for this task but only if you are willing to suffer
substantial deterioration of the signals. Best options are cable,
move the DVD and/or move the HiFi.

Kal

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...
--
Tony Sayer

Wireless connection between dvd & audio system?
 

In article , Kalman Rubinson
writes
On Sat, 6 Dec 2003 11:04:43 -0000, "Tom Bennett"
wrote:

I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

There are RF links for this task but only if you are willing to suffer
substantial deterioration of the signals. Best options are cable,
move the DVD and/or move the HiFi.

Kal

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...
--
Tony Sayer

Wireless connection between dvd & audio system?
 

"Tom Bennett" wrote in message
...
I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

Maplin do a wireless link designed for transmitting video whiich I imagine
could be used to transmit audio only.

Wireless connection between dvd & audio system?
 

"Tom Bennett" wrote in message
...
I'm looking for a technical fix to a problem I've got and I'm hoping
someone can point me in the right direction.

I need to connect the audio output of my DVD player to my Sony HiFi, but
they're at opposite ends of the room (about 15m cable run), with 3
doorways in between. To make matters worse, I recently had a new carpet
professionally fitted and I don't want to start peeling it back to lay
cables and I don't want cables under the 3 doorway, anyway.

Is there a wireless link I can buy to connect the DVD to the Sony and, if
so, do you know of a UK supplier?

Maplin do a wireless link designed for transmitting video whiich I imagine
could be used to transmit audio only.

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 18:01:38 +0000, tony sayer
wrote:

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...

I have not tried this unit but the generally available 2.4GHz
transmitter/receiver pairs in the US do severely compromise quality,
even if used as you suggest. If these are, indeed, superior, that's
good to know.

Kal

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 18:01:38 +0000, tony sayer
wrote:

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...

I have not tried this unit but the generally available 2.4GHz
transmitter/receiver pairs in the US do severely compromise quality,
even if used as you suggest. If these are, indeed, superior, that's
good to know.

Kal

Wireless connection between dvd & audio system?
 

In article , Kalman Rubinson
writes
On Sat, 6 Dec 2003 18:01:38 +0000, tony sayer
wrote:

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...

I have not tried this unit but the generally available 2.4GHz
transmitter/receiver pairs in the US do severely compromise quality,
even if used as you suggest. If these are, indeed, superior, that's
good to know.

Kal

Well they do output a bit more power some 25 or so milliwatts. I've used
them to carry SPDIF over short distances such as the original poster
requires and much longer with bigger antennas..
--
Tony Sayer

Wireless connection between dvd & audio system?
 

In article , Kalman Rubinson
writes
On Sat, 6 Dec 2003 18:01:38 +0000, tony sayer
wrote:

You could try an upmarket video sender unit on 2.4 Ghz and put the SPDIF
if you have that output on Co-ax on the DVD, and a SPDIF input on the
"receiving" end and use the "video" channel on the 2.4 Ghz link. I've
used this over longer distances and it works very well. In fact I've
used it up to 3 miles! On a line-of-sight basis for a temporary link.

Course the aerials were largish parabola's. You might find some break-up
if you get multipath reflections from time to time but it does work
surprisingly well. In fact the SPDIF signal isn't that far removed from
Video in level and amplitude.

http://www.g1mfg.com/

supplies some of these units that are better than those found in the
shops, and his gear will work on 2.4 G exempt channels...

I have not tried this unit but the generally available 2.4GHz
transmitter/receiver pairs in the US do severely compromise quality,
even if used as you suggest. If these are, indeed, superior, that's
good to know.

Kal

Well they do output a bit more power some 25 or so milliwatts. I've used
them to carry SPDIF over short distances such as the original poster
requires and much longer with bigger antennas..
--
Tony Sayer

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 20:38:26 +0000, tony sayer
wrote:

Well they do output a bit more power some 25 or so milliwatts. I've used
them to carry SPDIF over short distances such as the original poster
requires and much longer with bigger antennas..

I know this can be done and I've been looking into it for a while with
the interest in using it for subwoofers and/or rear/surround speakers
in a multichannel sound system. This would eliminate the need to run
many cables around or under the floor.

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

Kal

Wireless connection between dvd & audio system?
 

On Sat, 6 Dec 2003 20:38:26 +0000, tony sayer
wrote:

Well they do output a bit more power some 25 or so milliwatts. I've used
them to carry SPDIF over short distances such as the original poster
requires and much longer with bigger antennas..

I know this can be done and I've been looking into it for a while with
the interest in using it for subwoofers and/or rear/surround speakers
in a multichannel sound system. This would eliminate the need to run
many cables around or under the floor.

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

Kal

Wireless connection between dvd & audio system?
 

In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.


Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?

--
*I pretend to work. - they pretend to pay me.

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.


Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?

--
*I pretend to work. - they pretend to pay me.

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

On Sat, 06 Dec 2003 22:54:20 +0000 (GMT), Dave Plowman
wrote:

In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?

I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Kal

Wireless connection between dvd & audio system?
 

On Sat, 06 Dec 2003 22:54:20 +0000 (GMT), Dave Plowman
wrote:

In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?

I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Kal

Wireless connection between dvd & audio system?
 

In article ,
Kalman Rubinson wrote:
I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.

I'm not necessarily disputing that it could be done, but $100 dollars
seems to be rather cheap as a retail figure given that even a modest
broadcast receiver will cost this and more. Without the transmitter.

--
*Go the extra mile. It makes your boss look like an incompetent slacker *

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

In article ,
Kalman Rubinson wrote:
I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.

I'm not necessarily disputing that it could be done, but $100 dollars
seems to be rather cheap as a retail figure given that even a modest
broadcast receiver will cost this and more. Without the transmitter.

--
*Go the extra mile. It makes your boss look like an incompetent slacker *

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

Hi,

In message , Kalman Rubinson
writes

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

I've been wondering why someone hasn't done this kind of thing with
802.11. Assuming a surround delivery system, 6 channels of 24 bit, 96kHz
would need a bandwidth of about 14 Megabits per second uncompressed (if
my dodgy sums are right), which is well within the 802.11g wireless LAN
specs, even allowing for some protocol overhead. Dolby Digital or DTS
would be much lower due to compression/packing. It wouldn't be "low end"
and it would mean putting a cheap microcontroller or ASIC, a D/A and the
amp within the speakers, but that's nothing new. Anyone see a reason
this wouldn't work?

--
Glenn Booth

Wireless connection between dvd & audio system?
 

Hi,

In message , Kalman Rubinson
writes

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

I've been wondering why someone hasn't done this kind of thing with
802.11. Assuming a surround delivery system, 6 channels of 24 bit, 96kHz
would need a bandwidth of about 14 Megabits per second uncompressed (if
my dodgy sums are right), which is well within the 802.11g wireless LAN
specs, even allowing for some protocol overhead. Dolby Digital or DTS
would be much lower due to compression/packing. It wouldn't be "low end"
and it would mean putting a cheap microcontroller or ASIC, a D/A and the
amp within the speakers, but that's nothing new. Anyone see a reason
this wouldn't work?

--
Glenn Booth

Wireless connection between dvd & audio system?
 

"Glenn Booth" wrote in message
...
Hi,

In message , Kalman Rubinson
writes

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

I've been wondering why someone hasn't done this kind of thing with
802.11. Assuming a surround delivery system, 6 channels of 24 bit, 96kHz
would need a bandwidth of about 14 Megabits per second uncompressed (if
my dodgy sums are right), which is well within the 802.11g wireless LAN
specs, even allowing for some protocol overhead. Dolby Digital or DTS
would be much lower due to compression/packing. It wouldn't be "low end"
and it would mean putting a cheap microcontroller or ASIC, a D/A and the
amp within the speakers, but that's nothing new. Anyone see a reason
this wouldn't work?

The main problem I can think of is with timing. For this to work you need a
common time for all sources. That would be very difficult to do with an
802.11 network.

For data transmission you don't tend to notice if transmission is
interrupted for half a second, trying to synchronised two or more channels
would be somewhat different.

Wireless connection between dvd & audio system?
 

"Glenn Booth" wrote in message
...
Hi,

In message , Kalman Rubinson
writes

One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.

I've been wondering why someone hasn't done this kind of thing with
802.11. Assuming a surround delivery system, 6 channels of 24 bit, 96kHz
would need a bandwidth of about 14 Megabits per second uncompressed (if
my dodgy sums are right), which is well within the 802.11g wireless LAN
specs, even allowing for some protocol overhead. Dolby Digital or DTS
would be much lower due to compression/packing. It wouldn't be "low end"
and it would mean putting a cheap microcontroller or ASIC, a D/A and the
amp within the speakers, but that's nothing new. Anyone see a reason
this wouldn't work?

The main problem I can think of is with timing. For this to work you need a
common time for all sources. That would be very difficult to do with an
802.11 network.

For data transmission you don't tend to notice if transmission is
interrupted for half a second, trying to synchronised two or more channels
would be somewhat different.

Wireless connection between dvd & audio system?
 

"Dave Plowman" wrote in message
...
In article ,
Kalman Rubinson wrote:
I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.


They are in live and broadcast environments.
If you pay just short of 3 grand a set for them you get something that's
incredibly hard to differentiate from the same type of mic in a wired
version.

The quality and reliability of radio mics has improved immensly over the
last ten years.

Peter

Wireless connection between dvd & audio system?
 

"Dave Plowman" wrote in message
...
In article ,
Kalman Rubinson wrote:
I said it could be included in an already self-powered speaker, itself
of not inconsequiential cost. If one has already invested the power
supply and amplifier, it was estimated that the receiver could be
added on for about $100. That was about 3 years ago.

OTOH, one might demand even higher quality in a mike feed than for a
surround channel speaker. I would.

Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.


They are in live and broadcast environments.
If you pay just short of 3 grand a set for them you get something that's
incredibly hard to differentiate from the same type of mic in a wired
version.

The quality and reliability of radio mics has improved immensly over the
last ten years.

Peter

Wireless connection between dvd & audio system?
 

On Sun, 07 Dec 2003 10:41:03 GMT
"Bedouin" wrote:

The main problem I can think of is with timing. For this to work you need a
common time for all sources. That would be very difficult to do with an
802.11 network.

For data transmission you don't tend to notice if transmission is
interrupted for half a second, trying to synchronised two or more channels
would be somewhat different.

you can sync a machine to sub millisecond precision easily over WiFi which
is probably OK for home theater.

If you dont use TCP/IP you could probably do better still.


--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Wireless connection between dvd & audio system?
 

On Sun, 07 Dec 2003 10:41:03 GMT
"Bedouin" wrote:

The main problem I can think of is with timing. For this to work you need a
common time for all sources. That would be very difficult to do with an
802.11 network.

For data transmission you don't tend to notice if transmission is
interrupted for half a second, trying to synchronised two or more channels
would be somewhat different.

you can sync a machine to sub millisecond precision easily over WiFi which
is probably OK for home theater.

If you dont use TCP/IP you could probably do better still.


--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Wireless connection between dvd & audio system?
 

In article ,
Pete wrote:
Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.


They are in live and broadcast environments.

Yes. I work in the latter.

If you pay just short of 3 grand a set for them you get something that's
incredibly hard to differentiate from the same type of mic in a wired
version.

If only this was true, you'd never use another cabled mic.

The quality and reliability of radio mics has improved immensly over the
last ten years.

I'm not even convinced about that. They've got smaller, certainly. But the
move to UHF brought other problems.

--
*Why isn't 11 pronounced onety one? *

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

In article ,
Pete wrote:
Possibly. But radio mics are rarely used where the highest possible
quality is required, regardless of what some might believe.


They are in live and broadcast environments.

Yes. I work in the latter.

If you pay just short of 3 grand a set for them you get something that's
incredibly hard to differentiate from the same type of mic in a wired
version.

If only this was true, you'd never use another cabled mic.

The quality and reliability of radio mics has improved immensly over the
last ten years.

I'm not even convinced about that. They've got smaller, certainly. But the
move to UHF brought other problems.

--
*Why isn't 11 pronounced onety one? *

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

In article , Dave Plowman
writes
In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.


Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?


Cos the pick up transducer costs a lorra dosh Dave. We're only talking
about a simple link here that I doubt would be good enough for a radio
mic and its environs.

Apart from that they aren't mass produced items are they?..
--
Tony Sayer

Wireless connection between dvd & audio system?
 

In article , Dave Plowman
writes
In article ,
Kalman Rubinson wrote:
One OEM I spoke with (and whose devices seem suitable) said that
receivers could easily and cheaply be included in self-powered
speakers. Unfortunately, all the 'high-end' speaker manufacturers
evinced curiousity but no real interest.


Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?


Cos the pick up transducer costs a lorra dosh Dave. We're only talking
about a simple link here that I doubt would be good enough for a radio
mic and its environs.

Apart from that they aren't mass produced items are they?..
--
Tony Sayer

Wireless connection between dvd & audio system?
 

you can sync a machine to sub millisecond precision easily over WiFi
which
is probably OK for home theater.

Maybe, but at 20kHz being out by just 25 *micro* seconds is 180degrees out
of phase, the same as reversing the polarity for wired speakers.

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

--
Jim H jh
@333
.org

Wireless connection between dvd & audio system?
 

you can sync a machine to sub millisecond precision easily over WiFi
which
is probably OK for home theater.

Maybe, but at 20kHz being out by just 25 *micro* seconds is 180degrees out
of phase, the same as reversing the polarity for wired speakers.

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

--
Jim H jh
@333
.org

Wireless connection between dvd & audio system?
 

In article ,
tony sayer wrote:
Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?


Cos the pick up transducer costs a lorra dosh Dave.

Really? ;-) Usually less than 10% of the cost - often much less.

We're only talking about a simple link here that I doubt would be good
enough for a radio mic and its environs.

I'd say it would suffer from many of the problems that radio mics do - the
home is quite a hostile environment for RF these days.

Apart from that they aren't mass produced items are they?..

True. But then to get real economy of scale you'd need to sell a lot. And
I'm not sure the demand is there.

--
*If at first you do succeed, try not to look too astonished.

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

In article ,
tony sayer wrote:
Hmm. If it could be done easily and cheaply at decent quality, why are
good quality radio mics so expensive?


Cos the pick up transducer costs a lorra dosh Dave.

Really? ;-) Usually less than 10% of the cost - often much less.

We're only talking about a simple link here that I doubt would be good
enough for a radio mic and its environs.

I'd say it would suffer from many of the problems that radio mics do - the
home is quite a hostile environment for RF these days.

Apart from that they aren't mass produced items are they?..

True. But then to get real economy of scale you'd need to sell a lot. And
I'm not sure the demand is there.

--
*If at first you do succeed, try not to look too astonished.

Dave Plowman London SW 12
RIP Acorn

Wireless connection between dvd & audio system?
 

On Sun, 07 Dec 2003 18:25:05 -0000
Jim H wrote:

you can sync a machine to sub millisecond precision easily over WiFi
which
is probably OK for home theater.

Maybe, but at 20kHz being out by just 25 *micro* seconds is 180degrees out
of phase, the same as reversing the polarity for wired speakers.

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

indeed, but 50us is back *in* phase again so its never clear cut anyway ;-)

certainly 'OK' for a cheap solution though.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Wireless connection between dvd & audio system?
 

On Sun, 07 Dec 2003 18:25:05 -0000
Jim H wrote:

you can sync a machine to sub millisecond precision easily over WiFi
which
is probably OK for home theater.

Maybe, but at 20kHz being out by just 25 *micro* seconds is 180degrees out
of phase, the same as reversing the polarity for wired speakers.

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

indeed, but 50us is back *in* phase again so its never clear cut anyway ;-)

certainly 'OK' for a cheap solution though.

--
Spyros lair: http://www.mnementh.co.uk/ |||| Maintainer: arm26 linux

Do not meddle in the affairs of Dragons, for you are tasty and good with ketchup.

Wireless connection between dvd & audio system?
 

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

indeed, but 50us is back *in* phase again so its never clear cut anyway
;-)

Ah, but 50us is then 180 out of phase for a 10Hz tone! I think we'd just
have to accept that the speakers would be out of phase.

certainly 'OK' for a cheap solution though.

I'm pretty sure you're right. Remember though that the speakers would
still need to be plugged in, so in many cases it'd be no easier than
normally wired stuff. IIRC, it's possible to send digital information
through mains wiring - might be a viable non-wireless solution?

Btw, I take issue with your I hate java section ;) best to keep it OT
though.

--
Jim H jh
@333
.org

Wireless connection between dvd & audio system?
 

How much this matters with all the little nodes from 4 speakers in play
I'm not sure.

indeed, but 50us is back *in* phase again so its never clear cut anyway
;-)

Ah, but 50us is then 180 out of phase for a 10Hz tone! I think we'd just
have to accept that the speakers would be out of phase.

certainly 'OK' for a cheap solution though.

I'm pretty sure you're right. Remember though that the speakers would
still need to be plugged in, so in many cases it'd be no easier than
normally wired stuff. IIRC, it's possible to send digital information
through mains wiring - might be a viable non-wireless solution?

Btw, I take issue with your I hate java section ;) best to keep it OT
though.

--
Jim H jh
@333
.org

Wireless connection between dvd & audio system?
 

On Sun, 07 Dec 2003 20:34:16 -0000, Jim H
wrote:

I'm pretty sure you're right. Remember though that the speakers would
still need to be plugged in, so in many cases it'd be no easier than
normally wired stuff.

I think easier is the point. Running long wires around the perimeter
of the room past (or over) several doorways or drilling holes to run
the wires below floors is much more work than plugging the speakers
into a power outlet.

IIRC, it's possible to send digital information
through mains wiring - might be a viable non-wireless solution?

Sure, soon as someone implements the interfaces.

Kal