User talk:水水

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Welcome...

Hello, 水水, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or place {{helpme}} on your talk page and ask your question there. Again, welcome! 七星 (talk) 04:43, 17 January 2009 (UTC)

MPEG Multichannel and MPEG Surround - compression formats?[edit]

Hello, I think MPEG Multichannel and MPEG Surround should not be in the Template:Compression formats. I think these formats are not about compression, but about using multiple channels. MPEG Surround can use various compression formats or uncompressed audio. MPEG Multichannel can use only MPEG-1/2 Audio Layer II.

ISO/IEC 23003-1:2007 describes MPEG Surround as an "efficient technology for multi-channel audio compression". "Rather than performing a discrete coding of the individual audio input channels, MPEG Surround captures the spatial image of a multi-channel audio signal into a compact set of parameters that are used to synthesize a high quality multi-channel representation from a transmitted downmix signal." [1] But I am not sure, if this is a compression format.--89.173.64.7 (talk) 10:05, 22 September 2010 (UTC)

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