TX4939 Datasheet, PDF (264/756 Pages) Toshiba Semiconductor – 64-Bit TX System RISC

Video Port
Toshiba RISC Processor
TX4939
12.3.4. Data Format
12.3.4.1. ITU.Bt.656 Format
The video data format is in 4:2:2 color sub-sampling, each pair of color-difference samples will be intermixed with two
luminance samples. The format for transmission shall be Cb, Y, Cr, Y. The following is a representation of the data format.
Byte0 Byte1 Byte2 Byte3
Cb0 Y0
Cr0 Y1
Cb1 Y2
Cr1 Y3
…………………………………….
Cb358 Y716 Cr358 Y717
Cb359 Y718 Cr359 Y719
……………………………………..
In main memory
- Transmit Video data can start at any byte address.
- Capture Video data must align to dword address.
12.3.4.2. MPEG2 data
‹ MPEG-2 Transport Stream (EN/ISO/IEC 13818-1)
Data: | Syncbyte |
187 Data bytes
| Syncbyte |
187 Data bytes
Byte: 0 1 2 3 4 -----------------------------185 186 187 188 189 190 --------------------------
12
‹ MPEG-2 Transport Stream (ETS 300 421)
Data: | Syncbyte |
203 Data bytes
| Syncbyte |
203 Data bytes
Byte: 0 1 2 3 4 ------------------------------201 202 203 204 205 206 207 -------------------
In main memory
- Transmit video data can start at any byte address.
- Capture Video data must align to dword address.
Rev. 3.3 May 18, 2007
12-6