Coding Details
If you open up an unencrypted VOB file or other program stream with a hex editor you will see the following structure.
| Name | Number of bits |
Description |
|---|---|---|
| sync bytes | 32 | 0x000001BA |
| marker bits | 2 | 01b |
| System clock | 3 | System Clock Reference (SCR) bits 32 to 30 |
| marker bit | 1 | 1 Bit always set. |
| System clock | 15 | System clock bits 29 to 15 |
| marker bit | 1 | 1 Bit always set. |
| System clock | 15 | System clock bits 14 to 0 |
| marker bit | 1 | 1 Bit always set. |
| SCR extension | 9 | |
| marker bit | 1 | 1 Bit always set. |
| bit rate | 22 | In units of 50 bytes per second. |
| marker bits | 2 | 11 Bits always set. |
| reserved | 5 | reserved for future use |
| stuffing length | 3 | |
| stuffing bytes | 8*stuffing length | |
| system header (optional) | 0 or more | if system header start code follows: 0x000001BB |
| Name | Number of bytes |
Description |
|---|---|---|
| sync bytes | 4 | 0x000001BB |
| header length | 2 | |
| rate bound and marker bits | 3 | |
| audio bound and flags | 1 | |
| flags, marker bit, and video bound | 1 | |
| Packet rate restriction and reserved byte | 1 |
Read more about this topic: MPEG Program Stream
Famous quotes containing the word details:
“Different persons growing up in the same language are like different bushes trimmed and trained to take the shape of identical elephants. The anatomical details of twigs and branches will fulfill the elephantine form differently from bush to bush, but the overall outward results are alike.”
—Willard Van Orman Quine (b. 1908)