Decoder system for decoding multi-standard encoded video
Presented herein are a decoder system for decoding multi-standard encoded video. In one embodiment, there is presented a system for decoding video data. The system comprises an outer loop symbol interpreter and an inner loop symbol interpreter. The outer loop symbol interpreter decodes VC-1 syntax and AVC syntax, at a slice or picture level. The inner loop symbol interpreter decodes VC-1 and AVC syntax at a macroblock level.
1. A system for decoding video data, said system comprising:
a first symbol interpreter for decoding VC-1 syntax and AVC syntax, at a slice or picture level, the first symbol interpreter determining descriptor data including at least one of a picture type, a picture length, a picture width, a pointer to bit plane data, a pointer to a slice structure, or a length of slice data; and
a second symbol interpreter for decoding VC-1 and AVC syntax at a macroblock level in response to the descriptor data, the second symbol interpreter including a coefficient constructor for constructing coefficients from the VC-1 syntax at the macroblock level or a vector constructor for constructing vectors from the VC-1 syntax at the macroblock level.
2. The system of claim 1 , wherein the second symbol interpreter comprises:
a coefficient constructor for constructing coefficients from the VC-1 syntax at the macroblock level.
3. The system of claim 1 , wherein the second symbol interpreter comprises:
a vector constructor for constructing vectors from the VC-1 syntax at the macroblock level.
4. The system of claim 1 , wherein the second symbol interpreter comprises:
variable length code engine for decoding variable length codes.
5. The system of claim 1 , wherein the first symbol interpreter comprises an outer loop symbol interpreter.
6. The system of claim 1 , wherein the second symbol interpreter comprises an inner loop symbol interpreter.
7. A method for decoding video data, said method comprising:
decoding VC-1 syntax and MPEG-2 syntax, at a slice or picture level at first symbol interpreter in an outer loop, the decoding at a slice or picture level comprising determining descriptor data including at least one of a picture type, a picture length, a picture width, a pointer to bit plane data, a pointer to a slice structure, or a length of slice data;
decoding VC-1 at a macroblock level at a second symbol interpreter in an inner loop, wherein the decoding VC-1 syntax at the macroblock level comprises constructing coefficients from the VC-1 syntax or constructing vectors from the VC-1 syntax;
decoding MPEG-2 at the macroblock level at the second symbol interpreter in the inner loop.
8. The method of claim 7 , wherein decoding VC-1 syntax at the macroblock level comprises:
constructing coefficients from the VC-1 syntax at the macroblock level at a coefficient constructor.
9. The method of claim 7 , wherein the decoding VC-1 syntax at the macroblock level comprises:
constructing vectors from the VC-1 syntax at the macroblock level at a vector constructor.
10. The method of claim 7 , wherein the decoding VC-1 syntax at the macroblock level further comprises:
variable length code engine for decoding variable length codes.
11. A system for decoding video data, said system comprising:
a first symbol interpreter for decoding variable length coded symbols encoded in accordance with VC-1 syntax and variable length coded symbols encoded in accordance with AVC syntax at a slice or picture level, the first symbol interpreter determining descriptor data including at least one of a picture type, a picture length, a picture width, a pointer to bit plane data, a pointer to a slice structure, or a length of slice data; and
a second symbol interpreter for decoding variable length coded symbols encoded in accordance with VC-1 syntax and variable length coded symbols encoded in accordance with AVC syntax at a macroblock level, the second symbol interpreter including a coefficient constructor for constructing coefficients from the VC-1 syntax at the macroblock level or a vector constructor for constructing vectors from the VC-1 syntax at the macroblock level.
12. The system of claim 11 , wherein decoding variable length coded symbols encoded in accordance with VC-1 syntax and variable length coded symbols encoded in accordance with AVC syntax at a slice or picture level comprises decoding picture header syntax elements.
13. The system of claim 11 , wherein the decoding variable length coded symbols encoded in accordance with AVC syntax at a macroblock level comprises decoding CABAC coded symbols.
14. The system of claim 12 , wherein the first symbol interpreter provides decoded picture header syntax elements to the second symbol interpreter, wherein the second symbol interpreter uses the picture header syntax elements to decode the variable length coded symbols encoded in accordance with VC-1 syntax and the variable length coded symbols encoded in accordance with AVC syntax at a macroblock level.
15. The system of claim 11 , wherein the second symbol interpreter comprises:
a vector constructor for constructing vectors from the VC-1 syntax at the macroblock level.
16. The system of claim 11 , wherein the second symbol interpreter comprises:
variable length code engine for decoding variable length codes.
17. The system of claim 1 , wherein the first symbol interpreter provides decoded picture header syntax elements to the second symbol interpreter, wherein the second symbol interpreter uses the picture header syntax elements to decode the variable length coded symbols encoded in accordance with VC-1 syntax and the variable length coded symbols encoded in accordance with AVC syntax at a macroblock level.
18. The method of claim 7 , further comprising:
providing decoded picture header syntax elements from the first symbol interpreter to the second symbol interpreter, wherein the second symbol interpreter uses the picture header syntax elements to decode the variable length coded symbols encoded in accordance with VC-1 syntax and the variable length coded symbols encoded in accordance with AVC syntax at a macroblock level.
19. The system of claim 1 , further comprising:
a slice descriptor buffer, the first symbol interpreter filling the slice descriptor buffer and the second symbol interpreter consuming the slice descriptor buffer prior to decoding macroblocks in the slice.
20. The method of claim 7 , further comprising:
filling a slice descriptor buffer of a slice in the outer loop and the consuming the slice descriptor buffer prior to decoding macroblocks of the slice in the inner loop.