System and method for using pattern vectors for video and image coding and decoding
An exemplary embodiment of the invention relates to a method of using pattern vectors for image coding and decoding. The method comprises converting a block of image data into a set of transform coefficients, quantizing the transform coefficients such that a number of the coefficients become zero, constructing a single entity or bit vector indicating which coefficients are non-zero, coding the single entity or bit vector as an integer using an adaptive, semi-adaptive or non-adaptive arithmetic coder, coding the values of the coefficients in any fixed order, using an adaptive, semi-adaptive or non-adaptive arithmetic coder, or some other coder, and coding all coefficients except the zero coefficients. The system and method of decoding data relate to the corresponding hardware and process steps performed by the decoder when decoding a bitstream coded as described herein.
1. A non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by a processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector to identify which transform coefficients in the entire block are non-zero; and
converting the transform coefficients into the block of image data.
2. The non-transitory computer-readable storage medium of claim 1 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
3. The non-transitory computer-readable storage medium of claim 1 , the operations further comprising:
decoding the non-zero transform coefficient that is identified.
4. The non-transitory computer-readable storage medium of claim 1 , the operations further comprising:
presenting an image based at least in part on the block of image data.
5. The non-transitory computer-readable storage medium of claim 1 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
6. The non-transitory computer-readable storage medium of claim 1 , wherein the bit vector comprises a single entity.
7. An apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector to identify which transform coefficients in the entire block are non-zero; and
converting the transform coefficients into the block of image data.
8. The apparatus of claim 7 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
9. The apparatus of claim 7 , the operations further comprising:
decoding the non-zero transform coefficient that is identified.
10. The apparatus of claim 7 , the operations further comprising:
presenting an image based at least in part on the block of image data.
11. The apparatus of claim 7 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
12. The apparatus of claim 7 , wherein the bit vector comprises a single entity.
13. A non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by a processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector to identify which transform coefficients in the entire block are non-zero;
dequantizing the identified non-zero transform coefficients; and
converting the dequantized transform coefficients into the block of image data.
14. The non-transitory computer-readable storage medium of claim 13 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
15. The non-transitory computer-readable storage medium of claim 13 , the operations further comprising:
decoding the identified non-zero transform coefficients.
16. The non-transitory computer-readable storage medium of claim 13 , the operations further comprising:
presenting an image based at least in part on the block of image data.
17. The non-transitory computer-readable storage medium of claim 13 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
18. The non-transitory computer-readable storage medium of claim 13 , wherein the bit vector comprises a single entity.
19. An apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector to identify which transform coefficients in the entire block are non-zero;
dequantizing the identified non-zero transform coefficients; and
converting the dequantized transform coefficients into the block of image data.
20. The apparatus of claim 19 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
21. The apparatus of claim 19 , the operations further comprising:
decoding the identified non-zero transform coefficients.
22. The apparatus of claim 19 , the operations further comprising:
presenting an image based at least in part on the block of image data.
23. The apparatus of claim 19 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
24. The apparatus of claim 19 , wherein the bit vector comprises a single entity.
25. A non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by a processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector for determining which transform coefficients in the entire block are non-zero;
dequantizing the non-zero transform coefficients after determining which transform coefficients in the entire block are non-zero; and
converting the dequantized transform coefficients into the block of image data.
26. The non-transitory computer-readable storage medium of claim 25 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
27. The non-transitory computer-readable storage medium of claim 25 , the operations further comprising:
decoding the non-zero transform coefficients that are identified.
28. The non-transitory computer-readable storage medium of claim 25 , the operations further comprising:
presenting an image based at least in part on the block of image data.
29. The non-transitory computer-readable storage medium of claim 25 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
30. The non-transitory computer-readable storage medium of claim 25 , wherein the bit vector comprises a single entity.
31. An apparatus, comprising:
a processor; and
a non-transitory computer-readable storage medium storing a plurality of instructions which, when executed by the processor, cause the processor to perform operations, the operations comprising:
receiving a bit vector that represents a mapping of an entire block of transform coefficients into a one-dimensioned list of transform coefficients in a fixed order, wherein the entire block of transform coefficients represents a block of image data;
decoding the bit vector for determining which transform coefficients in the entire block are non-zero;
dequantizing the non-zero transform coefficients after determining which transform coefficients in the entire block are non-zero; and
converting the dequantized transform coefficients into the block of image data.
32. The apparatus of claim 31 , wherein the decoding the bit vector is based at least in part on a context of the bit vector.
33. The apparatus of claim 31 , the operations further comprising:
decoding the non-zero transform coefficients that are identified.
34. The apparatus of claim 31 , the operations further comprising:
presenting an image based at least in part on the block of image data.
35. The apparatus of claim 31 , wherein the decoding the bit vector is accomplished using one of: an adaptive arithmetic decoder and a non-adaptive arithmetic decoder.
36. The apparatus of claim 31 , wherein the bit vector comprises a single entity.