Hello, The manufacturer Cirrus has launched a chip, the CS7410, which can handle decompression of MP3, WMA and "future formats". It contains an 'audio' 16 bit DSP and an ARM core and is supposed to be a cheap solution, IE to be put into cheap $50 CD players. Here's the link to the article on it: http://www.electronicsweekly.co.uk/issue/articleview.asp?vpath=/articles/2002/07/31/tech02.htm&mode=archive Sorry for the long URL. If that fails, goto http://www.electronicsweekly.co.uk/ click on Archive, then search for the part number. My DSP programming is pretty much nonexistent, but it does looks as though this chip might be up to Vorbis decoding? OK so I wouldn't expect some individual to rush out and build a player based on this chip, but once hardware becomes available that uses this chip, it might become easier to 'modify' the firmware to add Vorbis, no? I'd be interested in heard what people think. Regards, Tone. <p><p><p><p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Tone wrote:>Hello, > >The manufacturer Cirrus has launched a chip, the CS7410, which can handle decompression of MP3, WMA and "future formats". It contains an 'audio' 16 bit DSP and an ARM core and is supposed to be a cheap solution, IE to be put into cheap $50 CD players. Here's the link to the article on it: > >http://www.electronicsweekly.co.uk/issue/articleview.asp?vpath=/articles/2002/07/31/tech02.htm&mode=archive > >Sorry for the long URL. If that fails, goto http://www.electronicsweekly.co.uk/ click on Archive, then search for the part number. My DSP programming is pretty much nonexistent, but it does looks as though this chip might be up to Vorbis decoding? OK so I wouldn't expect some individual to rush out and build a player based on this chip, but once hardware becomes available that uses this chip, it might become easier to 'modify' the firmware to add Vorbis, no? > >I'd be interested in heard what people think >Cirrus's page on the chip: http://www.cirrus.com/design/products/overview/detail.cfm?d=912 Chip specs: http://www.cirrus.com/pubs/cs7410-1.pdf?DocumentID=894 Page says "Supports MP3, WMA, and other audio decompression standards upon request" -- anyone want to request? This looks like all the hardware guts of a CD player, except of course the actual CD reading part, on one chip, plus DSP to do compressed audio. -- Kenneth Arnold <p><p><p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.
Hi all. I've been away for what seems like forever. So I see that 1.0 is out. Nice to see the adaptation for low sample rates. Does that mean Vorbisenc has been modified to support them entirely? Or has the warning just been suppressed because it was considered to be good enough already? Just matter of interest, really. There's just one thing that I have to criticise about release 1. I think it compresses the stereo image far too aggressively & there's no way I could find stop it. (I always thought every MP3 codec's joint stereo mode sucked because of that. Use only a light stereo enhancement & suddenly you've got the chirps.) One thing I want to use Vorbis for is to upload audio samples of my music to my website so people can either jam along to it by muting the left channel, or hear the part by muting the right. As you can tell, this requires either the stereo image to be encoded at the same quality level as the main signal, or for the file to be encoded as independent dual channel. My only solution at the current time is to go back to v0.9 because with v1 I feel that I have to be using a quality level of 6 before I get decent stereo image encoding, which makes the files unacceptably large for my purpose. Any ideas? <p>PS - Doesn't "Dual Stereo" imply that there are two stereo streams & therefore four channels? - Shawn __________________________________________________ Do You Yahoo!? Everything you'll ever need on one web page from News and Sport to Email and Music Charts http://uk.my.yahoo.com <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe messages sent to the list will be ignored/filtered.