Abstract
A video encoder is configured to determine a picture size for one or more pictures included in a video sequence. The picture size associated with the video sequence may be a multiple of an aligned coding unit size for the video sequence. In one example the aligned coding unit size for the video sequence may comprise a minimum coding unit size where the minimum coding unit size is selected from a plurality of smallest coding unit sizes corresponding to different pictures in the video sequence. A video decoder is configured to obtain syntax elements to determine the picture size and the aligned coding unit size for the video sequence. The video decoder decodes the pictures included in the video sequence with the picture size and stores the decoded pictures in a decoded picture buffer.
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Technologies
Signal Processing
Product
Use Cases
Mobile TV/ Radio
Services
Claim
1. A method of encoding video data comprising:', 'determining a smallest coding unit size for each of a plurality of pictures defining a video sequence, wherein a smallest coding unit size is selected from a plurality of possible coding unit sizes including a maximum possible coding unit size; determining an aligned coding unit size for the video sequence based on the plurality of possible coding unit sizes;', 'determining a picture size associated with the video sequence, wherein the picture size associated with the video sequence is an multiple of the aligned coding unit size; and', 'signaling the aligned coding unit size value in sequence level syntax', 'information.
2. The method of claim 1, wherein the aligned coding unit size is the maximum possible coding unit size.
3. The method of claim 2, wherein the plurality of possible coding unit sizes includes a maximum coding unit size of 64x64 pixels.
4. The method of claim 1, wherein determining a smallest coding unit size for each of the plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 4x4 pixels.
5. The method of claim 1, wherein determining a smallest coding unit size for each of the plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 8x8 pixels.
6. The method of claim 1, wherein the picture size specifies a picture size of a decoded picture stored in a decoded picture buffer.
7. A device configured to encode video data comprising:', 'means for determining a smallest coding unit size for each of a plurality of pictures defining a video sequence, wherein a smallest coding unit size is selected from a plurality of possible coding unit sizes including a maximum possible coding unit size; means for determining an aligned coding unit size for the video sequence based on the plurality of possible coding unit sizes;', 'means for determining a picture size associated with the video sequence, wherein the picture size associated with the video sequence is an multiple of the aligned coding unit size; and', 'means for signaling the aligned coding unit size value in sequence level syntax information.
8. The device of claim 7, wherein the aligned coding unit size is the maximum possible coding unit size.
9. The device of claim 7, wherein the plurality of possible coding unit sizes includes a maximum coding unit size of 64x64 pixels
10. The device of claim 7, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 4x4 pixels
11. The device of claim 7, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 8x8 pixels
12. The device of claim 7, wherein the picture size specifies a picture size of a decoded picture stored in a decoded picture buffer
13. A device comprising a video encoder configured to:', 'determine a smallest coding unit size for each of a plurality of pictures defining a video sequence, wherein a smallest coding unit size is selected from a plurality of possible coding unit sizes including a maximum possible coding unit size;', 'determine an aligned coding unit size for the video sequence based on the plurality of possible coding unit sizes;', 'determine a picture size associated with the video sequence, wherein the picture size associated with the video sequence is an multiple of the aligned coding unit size; and', 'signal the aligned coding unit size value in sequence level syntax information
14. The device of claim 13, wherein the aligned coding unit size is the maximum possible coding unit size
15. The device of claim 14, wherein the plurality of possible coding unit sizes includes a maximum coding unit size of 64x64 pixels
16. The device of claim 13, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 4x4 pixels
17. The device of claim 13, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the aligned coding unit size for the video sequence is 8x8 pixels
18. The device of claim 13, wherein the picture size specifies a picture size of a decoded picture stored in a decoded picture buffer
19. A computer readable medium comprising instructions stored thereon that when executed cause a processor to:', 'determine a smallest coding unit size for each of a plurality of pictures defining a video sequence, wherein a smallest coding unit size is selected from a plurality of possible coding unit sizes including a maximum possible coding unit size;', 'determine an aligned coding unit size for the video sequence based on the plurality of possible coding unit sizes;', 'determine a picture size associated with the video sequence, wherein the picture size associated with the video sequence is an multiple of the aligned coding unit size; and', 'signal the aligned coding unit size value in sequence level syntax information.
20. The computer readable medium of claim 19, wherein the aligned coding unit size is the maximum possible coding unit size.
21. The computer readable medium of claim 20, wherein the plurality of possible coding unit sizes includes a maximum coding unit size of 64x64 pixels.
22. The computer readable medium of claim 19, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the minimum coding unit size for the video sequence is 4x4 pixels.
23. The computer readable medium of claim 19, wherein determining a smallest coding unit size for each of a plurality of pictures includes determining a first smallest coding unit size of 4x4 pixels for a first picture and determining a second smallest coding unit size of 8x8 pixels for a second picture; and wherein the minimum coding unit size for the video sequence is 8x8 pixels.
24. The computer readable medium of claim 19, wherein the picture size specifies a picture size of a decoded picture stored in a decoded picture buffer.
25. A method of decoding video data comprising:', 'obtaining a coded video sequence including a first picture coded using a first smallest coding unit size and a second picture coded using second smallest coding unit size;', 'obtaining a picture size of a decoded picture to be stored in a decoded picture buffer wherein the picture size is a multiple of one of the first coding unit size, the second coding unit size, or a maximum coding unit size; and', 'storing the decoded picture in a decoded picture buffer.
26. The method of claim 25, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the first coding unit size.
27. The method of claim 25, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the second coding unit size.
28. The method of claim 25, wherein the maximum coding unit size is 64x64 pixels and the pictures size is a multiple of the maximum coding unit size.
29. A device configured to decode video data comprising:', 'means for obtaining a coded video sequence including a first picture coded using a first smallest coding unit size and a second picture coded using second smallest coding unit size;', 'means for obtaining a picture size of a decoded picture to be stored in a decoded picture buffer wherein the picture size is a multiple of one of the first coding unit size, the second coding unit size, or a maximum coding unit size; and', 'means for storing the decoded picture in a decoded picture buffer.
30. The device of claim 29, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the first coding unit size.
31. The device of claim 29, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the second coding unit size.
32. The device of claim 29, wherein the maximum coding unit size is 64x64 pixels and the pictures size is a multiple of the maximum coding unit size.
33. A device comprising a video decoder configured to:', 'obtain a coded video sequence including a first picture coded using a first smallest coding unit size and a second picture coded using second smallest coding unit size;', 'obtain a picture size of a decoded picture to be stored in a decoded picture buffer wherein the picture size is a multiple of one of the first coding unit size, the second coding unit size, or a maximum coding unit size; and', 'store the decoded picture in a decoded picture buffer.
34. The device of claim 33, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the first coding unit size.
35. The device of claim 33, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the second coding unit size.
36. The device of claim 33, wherein the maximum coding unit size is 64x64 pixels and the pictures size is a multiple of the maximum coding unit size.
37. A computer readable medium comprising instructions stored thereon that when executed cause a processor to:', 'obtain a coded video sequence including a first picture coded using a first smallest coding unit size and a second picture coded using second smallest coding unit size;', 'obtain a picture size of a decoded picture to be stored in a decoded picture buffer wherein the picture size is a multiple of one of the first coding unit size, the second coding unit size, or a maximum coding unit size; and', 'store the decoded picture in a decoded picture buffer.
38. The computer readable medium of claim 37, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the first coding unit size.
39. The computer readable medium of claim 37, wherein the first smallest coding unit size is 4x4 pixels and the second coding unit size is 8x8 pixels and the pictures size is a multiple of the first coding unit size.
40. The computer readable medium of claim 37, wherein the maximum coding unit size is 64x64 pixels and the pictures size is a multiple of the maximum coding unit size.']
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Patent number:WO2013012864A1
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
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