Re: FPGA encode stages flow diagram
digital design <[email protected]> Sat, 26 Mar 2011 17:31:01 +0300
| Newsgroups | gmane.comp.multimedia.ogg.theora.devel |
|---|---|
| Message-ID | <[email protected]> |
Thank you Timothy! Now i undestand how tokens are made from zig-zaged block. I redraw stage-I in my blog http://developer-fpga.blogspot.com/, see diagram https://lh4.googleusercontent.com/-wDLGljOWTCs/TY3ofIhqNzI/AAAAAAAAAp8/nvdCht-qjbc/s1600/stage1.a.jpg But i'm litle confused seen table 7.38 of Theora spec. How i understand we use only 8 bit values in coder (for quantized coefficient of block), but in table 7.38 is (for example token value = 22) i see tokenization of values more than 255? How it's possible? Extrabits for token value=22 is 10 bits. This mean we can present -512..+512 magnitude values for coeffs..... How it's possible? Ok. May be this is why when DCTed our 8-bits values we at result have 16-bits value out. Ok this is understand, but why realy thear are tokens fo 10-bits value? (Is it because we use quantization ?) * * _______________________________________________ theora-dev mailing list [email protected] http://lists.xiph.org/mailman/listinfo/theora-dev