Re: [oc] =?gb2312?B?tPC4tDogW29jXSBWaWRlbyBjb21wcmVzc2lvbiBzeXN0ZW1zICg=?= Suggesting H263 codec core)

[Richard Herveille <richard@asics.ws>]

>
>Hi,
>   There seems a very important part isn't inclueded, the motion estimation
>and compensation.

Correct. It's a common block, just like the DCT, quantization and entropy 
units.

>  And I think dct block should not be parallel with the
>H.261, H.263, MPEG-1, MPEG-2, MPEG-4, etc.

OK, so maybe create a separate directory called common ??

i.e.

-common
  - dct block
    - dct engine
    - etc.
  - motion blocks
    - motion estimator
    - motion compensator


Richard



>Sheng Lin
>
>
>
> 
>
>                     Richard 
>
>                     Herveille              收件人： 
> cores@opencores.org
>                     <richard@asics.        抄送： 
> wpercybrooks@yahoo.com,
>                     ws>                    pawanpawan@hotmail.com 
>
>                     发件人：               传真致： 
>
>                     owner-cores@ope        主题：  [oc] Video compression 
> systems
>                     ncores.org             (Suggesting H263 codec 
> core)
> 
>
> 
>
>                     02-03-16 
> 19:44
>                     请答复 给 
> cores
> 
>
> 
>
>
>
>
>
>
>Hi,
>
>To get this project started, here's what I would like to suggest. In order
>to be as open as possible and to be able to expand the project to say
>MPEG-2 or similar, I would like to divide the project into separate blocks.
>
>Since the DCT unit is a common block for all DCT based codecs this would be
>
>one block, the audio codec and control logic would be another block. I
>would like to divide the web-pages and the directory structure in the same
>manner.
>
>For example:
>
>- video codec
>    - dct block
>      - dct engine
>      - (de)quantization unit
>      - entropy unit
>        - huffman coding
>          - run-length encoder/decoder
>          - huffman tables
>        - arithmetic coding
>      -
>    - H.261
>    - H.263
>    - MPEG-1
>    - MPEG-2
>    - MPEG-4
>    - etc.
>- audio codec
>    - MPEG-1
>      - layer-1
>      - layer-2
>      - layer-3
>    - MPEG-2
>    - G.711
>    - G.722
>    - G.723
>    - G.728
>    - G.729
>    - etc.
>- multiplexing
>    - H.222.0
>    - H.222.1
>    - etc.
>- control
>    - H.230
>    - H.242
>    - H.245
>    - etc.
>- multipoint
>- etc. etc
>- system
>    - H.320
>      - video: H.261 or H.263
>      - audio: G.711, G.722 or G.728
>      - multiplexing: H.221
>      - control: H.230 or H.242
>      - multipoint: H.231
>      - data: T.120
>    - MJPEG
>    - MPEG-1
>      - MPEG-1 video
>      - MPEG-1 audio
>    - etc.
>
>
>All directories contain blocks with a specific function, except for the
>'system' directory. It contains top-level modules that combine blocks from
>the previous directories into a complete defined system.
>
>This is a lot of work and it requires a lot of planning to have all blocks
>operate as plug-and-play blocks, but this seems the best approach. We can
>start with a few blocks to get the H.263 codec working and then move on to
>other blocks. If people want to help, they can take on a block and thus
>extend our system.
>
>If you want to help or want to give any comments please do so.
>
>Richard
>
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