Method and system for encoding and decoding data in a video stream
View Patent ↗In a block-based video stream, a first bit representing video data at a predefined location is identified. The video data at the first bit is replaced with a bit of non-video data prior to being transmitted to a device used to process the block-based video stream. Additional bits of non-video information are transmitted by replacing additional bits of video data within the block based video stream. A processing device that receives the block-based video stream accesses the non-video bits to obtain the non-video data.
1. A method of including non-video data in a video stream, the method comprising:
identifying in a block-based video stream a first block of image data at a first predefined location of the block based video stream; and
replacing at least one first bit of the first block of image data with a first portion of non-image data, where the at least one first bit is at a predefined location within the first block.
2. The method of claim 1 , wherein replacing comprises the first block of image data being a frequency representation of video data.
3. The method of claim 2 , wherein identifying comprises the first block of image data being a portion of a bidirectional fame of data.
4. The method of claim 2 , wherein identifying comprises the first block of image data being a block of chrominance data.
5. The method of claim 4 , wherein identifying comprises the first block of image data being a portion of a bidirectional frame of data.
6. The method of claim 4 , wherein replacing further comprises the predefined location being a portion of a last word of the first block.
7. The method of claim 6 , wherein replacing comprises the portion of the last word being the last bit of the first block.
8. The method of claim 2 , wherein identifying comprises the first block of image data being a block of luminance data.
9. The method of claim 2 , wherein identifying comprises the first block of image data being a block of image data compliant with a Motion Picture Expert's Group (MPEG) protocol.
10. The method of claim 1 , further comprising:
compressing the first block of image data after replacing.
11. The method of claim 10 , wherein compressing comprises compressing using run length encoding.
12. The method of claim 10 , wherein compressing comprises compressing using Huffman encoding.
13. The method of claim 1 further comprising:
identifying in the block-based video stream a second block of image data at a second predefined location of the block based video stream;
replacing at least one second bit of the second block of image data with at least a second portion of the non-image data, where the at least one second bit is at a predefined location within the second block.
14. The method of claim 13 , wherein the first block is at a predefined picture group location within a first picture group and the second block is at the predefined picture group location within a second picture group.
15. The method of claim 13 , wherein the first block is at a first predefined picture group location within a first picture group and the second block is at a second predefined picture group location within the first picture group.
16. A method of receiving non-image data comprising:
identifying in a block-based video stream a first block of image data at a first predefined location of the video stream; and
storing at least one bit of the first block of image data as at least a portion of non-image data, where the at least one bit is at a predefined location within the first block.
17. The method of claim 16 , wherein identifying comprises the first block of image data being a frequency representation of image data.
18. The method of claim 17 , wherein identifying comprises the first block of image data being a bidirectional frame of image data.
19. The method of claim 17 , wherein identifying comprises the first block of image data being a block of chrominance data.
20. The method of claim 19 , wherein identifying comprises the first block of image data further being a portion of a bidirectional frame of data.
21. The method of claim 19 , wherein storing further comprises the predefined location being at least a portion of a last word of the first block.
22. The method of claim 21 , wherein storing further comprises the at least a portion of the last word being the last bit of the first block.
23. The method of claim 17 , wherein identifying comprises the first block of image data being a block of luminance data.
24. The method of claim 16 , wherein identifying comprises the first block of image data being a block of image data compliant with a Motion Picture Expert's Group (MPEG) protocol.
25. The method of claim 16 , further comprising:
decompressing the first block of image data prior replacing.
26. The method of claim 25 , wherein decompressing comprises decompressing using nm length encoding.
27. The method of claim 25 , wherein compressing comprises compressing using Huffman encoding.
28. The method of claim 16 further comprising:
identifying in the block-based video stream a second block of image data at a second predefined location of the video stream;
storing at least one bit of the second block of image data as at least a portion of the non-image data, where the at least one bit is at a predefined location within the first block.
29. The method of claim 16 , wherein the first block is at a predefined picture group location within a first picture group and the second block is at the predefined picture group location within a second picture group.
30. The method of claim 16 , wherein the first block is at a first predefined picture group location within a first picture group and the second block is at a second predefined picture group location within a second picture group.
31. A method of encoding non-image data in a block-based video stream, the method comprising:
determining a plurality of non-image data portions, each one of the plurality of non-image data portions to be associated with a different block of data;
storing the plurality of non-image data portions in the different blocks of data, wherein the different blocks of data each represent image data in a frequency domain.
32. The method of claim 31 further comprising:
compressing the different blocks of data after storing.
33. The method of claim 31 , wherein storing comprises each of the different blocks of data are associated with bidirectional frames of image data.
34. The method of claim 31 , wherein storing comprises each of the different blocks of data being associated with a different group of pictures than each other of the different blocks of data.
35. A system comprising:
a video data processing element;
a memory coupled to the video data processing element, the memory comprising:
a video data storage region to store a first frame of image data and a second frame of image data; and
a program storage region to store program instructions, the program instructions to facilitate:
identifying in a block-based video stream a first block of image data at a first predefined location of the video stream; and
replacing at least one bit of the first block of image data with at least a first portion of non-image data, where the at least one bit is at a predefined location within the first block.
36. A system comprising:
means for identifying, in a block-based video stream, a selected block of image data at a predefined location of the block-based video stream; and
means for replacing at least one first bit of the selected block of image data with a first portion of non-image data, where the at least one first bit is at a predefined location within the selected block.