SCALABLE VIDEO CODING WITH ENHANCED BASE LAYER

• US 20130301702A1
• Filed: 05/14/2013
• Published: 11/14/2013
• Est. Priority Date: 05/14/2012
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility LLC (Lenovo Group Ltd.)
• Inventors: Minoo, Koohyar, Luthra, Ajay K., Baylon, David M.
• Granted Patent: US 9,544,587 B2
• Time in Patent Office: Days
• US Class Current: 375/240.02
• CPC Class Codes: H04N 19/119 Adaptive subdivision aspects, e.g. subdivision of a picture into rectangular or non-rectangular coding blocks
• CPC Class Codes: H04N 19/12 Selection from among a plurality of transforms or standards, e.g. selection between discrete cosine transform [DCT] and sub-band transform or selection between H.263 and H.264
• CPC Class Codes: H04N 19/136 Incoming video signal characteristics or properties
• CPC Class Codes: H04N 19/167 Position within a video image, e.g. region of interest [ROI]
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/184 the unit being bits, e.g. of the compressed video stream
• CPC Class Codes: H04N 19/30 using hierarchical techniques, e.g. scalability H04N19/63 takes precedence
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence

Abstract

Disclosed is a method comprising: (a) receiving a layer 0 bitstream, the layer 0 bitstream including coding information for the layer 0 bitstream; (b) receiving a layer 1 bitstream, the layer 1 bitstream including coding information for the layer 1 bitstream; and (c) reconstructing the layer 0 bitstream using previously received information for another layer 0 bitstream and previously received information for another layer 1 bitstream.

Claims

1. A method comprising:

receiving a layer 0 bitstream, the layer 0 bitstream including coding information for the layer 0 bitstream;

receiving a layer 1 bitstream, the layer 1 bitstream including coding information for the layer 1 bitstream; and

reconstructing the layer 0 bitstream using previously received information for a layer 0 bitstream and previously received information for a layer 1 bitstream.

2. The method of claim 1 wherein the layer 1 bitstream includes complementary information to the layer 0 bitstream.

3. The method of claim 1 wherein reconstructing uses a highest quality or highest resolution reference information available.

4. The method of claim 3 wherein the reference information includes reference picture information.

5. The method of claim 4 wherein the reference information is derived from a layer 0 bitstream.

6. The method of claim 4 wherein the reference information is derived from a layer 1 bitstream.

7. The method of claim 4 wherein the reference information is derived from a combination of a layer 0 bitstream and a layer 1 bitstream.

8. The method of claim 3 wherein using the highest quality or highest resolution reference information available improves the quality of interpolated or non-interpolated reference samples used for the reconstruction of a layer 0 bitstream.

9. The method of claim 1 further comprising:

receiving a layer 2 bitstream, the layer 2 bitstream including coding information for the layer 2 bitstream; and

reconstructing the layer 0 bitstream using previously received information for a layer 0 bitstream, previously received information for a layer 1 bitstream, and previously received information for a layer 2 bitstream.

10. The method of claim 1 further comprising:

adjusting the layer 0 coding information based on corresponding coding information in the layer 1 bitstream.

11. The method of claim 10 wherein the corresponding coding information of the layer 0 bitstream and layer 1 bitstream comprises motion information.

12. The method of claim 11 wherein the motion information comprises partitioning information and motion vectors.

13. The method of claim 1 wherein if a portion of coding information of the layer 0 bitstream is unavailable, then using corresponding coding information from the layer 1 bitstream.

14. The method of claim 13 wherein the corresponding coding information of the layer 0 bitstream and layer 1 bitstream comprises motion information.

15. The method of claim 14 wherein the motion information comprises partitioning information and motion vectors.

16. An apparatus comprising:

an encoder configured to encode a layer 0 bitstream and a layer 1 bitstream, wherein the layer 0 bitstream includes coding information for the layer 0 bitstream, and wherein the layer 1 bitstream includes coding information for the layer 1 bitstream; and

wherein the encoder encodes the layer 0 bitstream using only previously received information for a layer 0 bitstream or encodes the layer 0 bitstream using previously received information from a layer 0 bitstream and previously received information for a layer 1 bitstream.

17. The apparatus of claim 16 further comprising a reconstruction loop to decode the encoded layer 0 bitstream and encoded layer 1 bitstream and to recombine the decoded bitstreams into a reconstructed video stream.

18. The apparatus according to claim 17 further comprising a buffer to store the reconstructed video stream.

19. The apparatus according to claim 17 wherein at least one of the reconstructed video stream and coding information is used as coding information for the encoder.

20. The apparatus of claim 19 wherein the coding information is at least one of reference picture information and coding information of the reconstructed video stream.

21. The apparatus of claim 20 wherein the reference picture information is derived from the layer 0 bitstream.

22. The apparatus of claim 20 wherein the reference picture information is derived from the layer 1 bitstream.