Talk:Differential pulse-code modulation

Djpark0115 (talk) 07:00, 21 May 2009 (UTC) Q^-1 is necessary in the encoder/ecoder diagram of option2 ??[reply]

Yes, good catch; it's needed in the type 2 encoder as well. Maybe you can alert the editor who made the figure... Dicklyon (talk) 17:19, 21 May 2009 (UTC)[reply]

Q^-1 is horribly wrong! Quantization is not invertible. Option 1 is only possible if no quantization is done and the compression algorithm is lossless. The whole article has a lot of errors. — Preceding unsigned comment added by 188.155.108.64 (talk • contribs)

You were right to remove the bad figure from option 1. I edited the text to make it correct, I think. Dicklyon (talk) 18:07, 8 January 2011 (UTC)[reply]

Please make it more 'audible'

Please explain the roles of Z^-1, the circuitry. —Preceding unsigned comment added by Piotroxp (talk • contribs) 06:51, 19 June 2009 (UTC)[reply]

I noted in the article that it represents a sample delay; it's obscure conventional DSP notation based on the Z transform. Dicklyon (talk) 18:16, 8 January 2011 (UTC)[reply]