Re: [dispatch] [AVT] Proposal to form Internet Wideband Audio Codec WG
Roni Even <Even.roni@huawei.com> Wed, 03 June 2009 17:15 UTC
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Date: Wed, 03 Jun 2009 20:14:04 +0300
From: Roni Even <Even.roni@huawei.com>
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To: 'Roni Even' <Even.roni@huawei.com>, dispatch@ietf.org
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Cc: avt@ietf.org
Subject: Re: [dispatch] [AVT] Proposal to form Internet Wideband Audio Codec WG
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Hi, I would like to clarify that I am not against the discussion of codecs at the IETF but I think that before deciding to standardize one at the IETF we should write requirements and analyze current codecs (standard as well as non-standards) and see if they provide a good fit. One of my points is that having an IETF standard track codec does not make it widely deployed as long as the IETF do not mandate codecs. I think that you can look at the discussion in the SIP forum about specifying a codec. I also think (and I will keep mentioning it) that one of the advantages of voice on IP or over the Internet is that you can have a higher quality user experience by using a wideband codec, it is a pity that G.711 is still widely used taking bigger bandwidth than current wideband audio with lower quality. Roni Even All, I would like to request agenda time inside the DISPATCH meeting to propose the formation of a new working group to define a Proposed Standard wideband audio codec. The text of the proposal is below. Comments, questions, and suggestions welcomed. Regards, Jason Internet Wideband Audio Codec (IWAC) Mailing Lists: TBD Chairs: TBD Area Directorate: Real Time Applications (RAI) Purpose: This new working group would be chartered with the purpose of collecting expertise within the IETF in order to review the design of audio codecs specifically for use with the Internet. Unlike other SDOs, these codecs would be optimized for use on the Internet, and as much as possible choose technology that does not require paying patent royalties. The Internet Low Bit Rate Codec (iLBC) work was done in AVT but it was felt that subsequent work should not be done in the AVT working group. This new working group will have as its primary purpose the standardization of a multi-purpose audio codec that can be used in various situations on the Internet. Some of the proposed Internet-specific requirements include: * scalable and adaptive bit rate; * various sampling rate profiles from narrow-band to super-wideband; * scalable complexity; * low latency; and * resilience to packet loss. There are a number of wide-band capable codecs defined by other SDOs. For instance, G.722 is seeing adoption in Enterprise applications since it is relatively simple and low-cost to deploy. However, it has a high, fixed bitrate and is not appropriate for mobile applications where spectrum efficiency is important or in consumer applications where available bandwidth is fluctuating or limited. G.722.2 (AMR-wideband) has been adopted by the 3GPP as a wideband standard for mobile applications. G.722.2 is relatively high cost due to patent royalties and is seeing minimal deployments outside of mobile handsets making it challenging to create wideband experiences on Internet-capable mobile devices when extending beyond the mobile network. In other cases, proprietary codecs are being adopted which further create islands with no interoperability unless widespread transcoding is performed. Transcoding leads to higher costs and lower quality. The goal of this working group is to define a single codec with multiple profiles which can be made available on a wide variety of Internet-capable devices including low-power, mobile devices as well as devices capable of utilizing high quality, high bitrate audio. Proposed Deliverables: 1) Requirements for wideband, Internet audio codec(s). 2) Algorithm description for wideband, Internet audio codec(s) as Proposed Standard. 3) Specification of payload format(s) for defined codecs as Proposed Standard _______________________________________________ dispatch mailing list dispatch@ietf.org https://www.ietf.org/mailman/listinfo/dispatch
- [dispatch] Proposal to form Internet Wideband Aud… Jason Fischl
- Re: [dispatch] Proposal to form Internet Wideband… Eric Burger
- Re: [dispatch] Proposal to form Internet Wideband… Roni Even
- Re: [dispatch] Proposal to form Internet Wideband… Scott Lawrence
- Re: [dispatch] Proposal to form Internet Wideband… Henry Sinnreich
- Re: [dispatch] Proposal to form Internet Wideband… Jason Fischl
- Re: [dispatch] Proposal to form Internet Wideband… Roni Even
- Re: [dispatch] Proposal to form Internet Wideband… Spencer Dawkins
- Re: [dispatch] Proposal to form Internet Wideband… Roni Even
- Re: [dispatch] Proposal to form Internet Wideband… Henry Sinnreich
- Re: [dispatch] Proposal to form Internet Wideband… Joel M. Halpern
- Re: [dispatch] Proposal to form Internet Wideband… Henry Sinnreich
- Re: [dispatch] Proposal to form Internet Wideband… Roni Even
- Re: [dispatch] Proposal to form Internet Wideband… Mary Barnes
- Re: [dispatch] Proposal to form Internet Wideband… Gonzalo Camarillo
- Re: [dispatch] Proposal to form Internet Wideband… Eric Burger
- Re: [dispatch] Proposal to form Internet Wideband… Cullen Jennings
- Re: [dispatch] Proposal to form Internet Wideband… eburger
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Roni Even
- Re: [dispatch] Proposal to form Internet Wideband… Slava Borilin
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Jean-Marc Valin
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Henry Sinnreich
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Roni Even
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Henning Schulzrinne
- Re: [dispatch] [AVT] Proposal to form Internet Wi… James M. Polk
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Spencer Dawkins
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Slava Borilin
- Re: [dispatch] [AVT] Proposal to form Internet Wi… stephen botzko
- Re: [dispatch] [AVT] Proposal to form Internet Wi… stephen botzko
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Joel M. Halpern
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Henning Schulzrinne
- Re: [dispatch] [AVT] Proposal to form Internet Wi… stephen botzko
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Henry Sinnreich
- Re: [dispatch] [AVT] Proposal to form Internet Wi… David Singer
- Re: [dispatch] [AVT] Proposal to form Internet Wi… David Singer
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Randell Jesup
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Slava Borilin
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Eric Burger
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Eric Burger
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Jean-Marc Valin
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Dan York
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Joel M. Halpern
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Henry Sinnreich
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Jason Fischl
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Dean Willis
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Christopher Montgomery
- Re: [dispatch] [AVT] Proposal to form Internet Wi… DRAGE, Keith (Keith)
- Re: [dispatch] [AVT] Proposal to form Internet Wi… Michael Ramalho (mramalho)