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> K750i: Stereo Bluetooth Headsets?
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@jc
Why wouldn't it work in stereo with the K700i handsfree profile over B/T 1.1?
Both my HCH-15 and SE (plug in) headphones use K700i handsfree profile.
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Posted: 2005-08-31 14:42:21
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Most of the people are missing the point here. These headphones might connect very well with the phone and might work perfectly for calls. You might also be able to hear the incoming call voice from both the earpieces too, BUT, now pay attention here, voice calls are not stereo. So is a mono channel sound data is heard over 2 earpieces, it doesn't make it stereo.
Now to the 2nd and more important point. K750 and all previous models support headset and handsfree profiles only. A2DP (Advanced Audio Delivery Profile) is not implemented in these phone's bluetooth stack. That essentially means that you won't be able to transmit sound from media player to these (or any bluetooth stereo headset for that matter).
You can invest money in these and can use it to make and attend calls
but forget about listening to music with these and K750.
And ya as for talking about bandwidth available to trasmit good enough amount of music data over bluetooth, yes it was not possible until bluetooth 1.2. But the latest bluetooth 2 specs have much higher bandwidth available and hence can transmit stereo music data over the air. You might also want to make note that bluetooth and Wifi (a.k.a. 802.11), which has quite high bandwidth, use same frequency spectrum to transmit data, meaning that its not the transmitting medium that restricts anything, but the protocol specifications itself that has limitations.
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Posted: 2005-08-31 17:06:31
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Ok. What Itanium makes sense, BUT. I've been looking all over the net trying to find out whether the K750i will work with an A2DP device or not. The fact that there is no mention of the A2DP profile in the K750i whitepages doesn't seem conclusive. For a start, the A2DP profile is included in the GAVDP (General Audio/Video Distribution Profile). Both of which are included in the BT 1.2 profile stack. Logic would suggest then, that any device which is BT 1.2 compliant can handle A2DP. But I'm not 100% on that because I haven't tried. I'm seriously considering ordering an A2DP adapter just to try it out and put an end to this.
The other thing I'd like to mention is with regard to someone's comment that the only SE handset to support A2DP is the P910. I looked through the whitepages of every single SE handset on the market at the moment for a mention of the A2DP profile and there is none. Even the GAVDP isn't mentioned in the Z800i which obviously has both in order to have 3G video and stereo capabilities. Therefore the fact that it is omitted from the whitepages doesn't seem to mean anything.
A2DP has been around for a while now, and while the K750i is BT 2.0 complient and SE was one of the original contributors to BT it seems odd that such a media oriented phone wouldn't support A2DP.
If anyone wants to make a donation I'll order a pair of A2DP BT headphones off Ebay today... unfortunately $100 seems a bit steap to buy just for the hell of it when it might not work.
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Posted: 2005-09-07 10:05:41
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Bad news:
http://developer.sonyericsson[....]null&forumId=13&readOnly=false
That doesn't sound promising to me! :'(
I guess we pray for a Firmware upgrade.
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Posted: 2005-09-08 23:17:22
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Yeah, I'm not real happy that the A2DP profile isn't in the K750i either.
Particularly as I've been itching to get my hands on this sensational looking headset...
http://www.bluetake.com/Products/BT420EX.htm
So please, please, please S-E give us a firmware upgrade that includes this profile!!!
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Posted: 2005-09-14 10:24:31
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Nokia 6230i has A2DP
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Posted: 2005-09-14 11:56:48
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Sorry if i'm going off the topic here, but is there any way at all to play sound from the media player application to any bt headset?
I don't care if it's stereo, nor if it's high quality, as i'm only listening to podcasts (talking) and mono audio books.
I have SE P910a. Some have suggested a bt transmitter + headset but the point is to use the phone's bt.
Thanks for any replies.
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Posted: 2005-09-19 01:54:06
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Ok... a firmware upgrade will NOT work unless the BT chipset itself is already BT v.2 compliant. That would be like saying a software upgrade will give me Hyper-Threading on a P-II CPU. You need BOTH the hardware and firmware to support the new stereo audio transmission.
And yes, the audio quality sucks. Imagine the crappiest headsets you can buy... then imagine that the jack was rusty and dirty and you kept twisting it around to get a solid connection (ever experience those crackly sounds?)... then you'll get pretty close to BT stereo audio.
Now, if you're the type who can stand to listen to MP3s encoded at 128kbps and lower... then you may not notice anything bad about the new BT stereo headsets.
Logitech has a white one... if you want a black one, you can get Logitech's "HP" branded one.
I'd say these things are better off for games where audio quality isn't that big a deal.
I'm wondering if these BT headsets have a memory buffer. Quality would improve a whole lot if they added 1MB of buffering so that the headset would have time to decode and add some DSP corrections
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Posted: 2005-09-19 05:39:50
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It's quite strange !
In K750i white paper on developper SE site, we can read :
"The K750i supports Bluetooth specification 2.0."
Page 27 in this document :
http://developer.sonyericsson.com/getDocument.do?docId=70824
So the K750i should/may support A2DP profile if its in BT2 specs, isn't it ?
BTW its not in Profiles list on page 28 ...
B.
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Posted: 2005-09-23 16:38:47
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Have a look at this model from Planex.
Anyone tried theese and know how the quality is?
http://www.planex.net/product/bluetooth/bt-01hss.htm
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Posted: 2005-09-26 01:20:30
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