Video processing system with layered video coding for fast channel change and methods for use therewith
View Patent ↗A video processing system includes a video encoder that encodes a video stream into an independent video layer stream and a first dependent video layer stream based on a motion vector data or grayscale and color data.
1. A video processing system comprising:
a video encoder that encodes a video stream into an independent video layer stream and a first dependent video layer stream, wherein the independent video layer stream includes a first plurality of random access points having a first frequency, and wherein the first dependent video layer stream includes a second plurality of random access points having a second frequency;
wherein, in a first mode of operation, a mobile communication device receives the independent video layer stream, to begin decoding the independent video layer stream based on at least one of the first plurality of random access points and generates a reconstructed video signal based on the independent video layer stream, without the first dependent video layer stream;
wherein the mobile communication device, in a second mode of operation, receives the first dependent video layer stream, to begin decoding the first dependent video layer stream based on at least one of the second plurality of random access points, to synchronize the independent video layer stream and the first dependent video layer stream to form a synchronized stream, and to generate a reconstructed video signal based on the synchronized stream.
2. The video processing system of claim 1 wherein the first frequency is greater than the second frequency.
3. The video processing system of claim 1 wherein decoding of the first dependent video layer stream is dependent on data from the independent video layer stream.
4. The video processing system of claim 1 wherein the video encoder further encodes the video stream into a second dependent video layer stream, and wherein the second dependent video layer stream includes a third plurality of random access points having a third frequency.
5. The video processing system of claim 3 wherein the first frequency is greater than the third frequency.
6. The video processing system of claim 5 wherein the second frequency is greater than the third frequency.
7. A video processing system comprising:
a video decoder that receives a video stream encoded into an independent video layer stream and a first dependent video layer stream that includes data that is dependent on data from the independent video layer stream wherein the independent video layer stream includes a first plurality of random access points having a first frequency, and wherein the first dependent video layer stream includes a second plurality of random access points having a second frequency, and wherein the first frequency is greater than the second frequency;
wherein the video decoder, in a first mode of operation, begins decoding the independent video layer stream based on at least one of the first plurality of random access points and generates a reconstructed video signal based on the independent video layer stream, without the first dependent video layer stream; and
wherein the video decoder, in a second mode of operation, begins decoding the first dependent video layer stream based on at least one of the second plurality of random access points, to synchronize the independent video layer stream and the first dependent video layer stream to form a synchronized stream, and to generate a reconstructed video signal based on the synchronized stream.
8. The video processing system of claim 7 , wherein decoding of the first dependent video layer stream is dependent on data from the independent video layer stream.
9. The video processing system of claim 7 wherein the video stream is further encoded into a second dependent video layer stream, and wherein the second dependent video layer stream includes a third plurality of random access points having a third frequency.
10. The video processing system of claim 9 wherein the first frequency is greater than the third frequency.
11. The video processing system of claim 9 wherein the second frequency is greater than the third frequency.
12. A method comprising:
receiving an independent video layer stream, wherein the independent video layer stream includes a first plurality of random access points having a first frequency; and
in a first mode of operation:
decoding the independent video layer stream based on at least one of the first plurality of random access points; and
generating a reconstructed video signal based on the decoded independent video layer stream, without the first dependent video layer stream;
in a second mode of operation:
receiving further a first dependent video layer stream, wherein the first dependent video layer stream includes a second plurality of random access points having a second frequency, and wherein the first frequency is greater than the second frequency;
decoding the independent video layer stream based on at least one of the first plurality of random access points;
decoding the first dependent video layer stream based on at least one of the second plurality of random access points; and
synchronizing the independent video layer stream and the first dependent video layer stream to form a synchronized stream; and
generating a reconstructed video signal based on the synchronized stream.
13. The method of claim 12 , wherein decoding of the first dependent video layer stream is dependent on data from the independent video layer stream.
14. The method of claim 12 further comprising:
encoding the video stream into a second dependent video layer stream, wherein the second dependent video layer stream includes a third plurality of random access points having a third frequency, and wherein the first frequency is greater than the third frequency.
15. The method of claim 14 wherein the second frequency is greater than the third frequency.
16. A method comprising:
receiving an independent video layer stream, wherein the independent video layer stream includes a first plurality of random access points having a first frequency; and
receiving a first dependent video layer stream, wherein the first dependent video layer stream includes a second plurality of random access points having a second frequency, and wherein the first frequency is greater than the second frequency;
in a first mode of operation:
decoding the independent video layer stream based on at least one of the first plurality of random access points; and
generating a reconstructed video signal based on the decoded independent video layer stream, without the first dependent video layer stream;
in a second mode of operation:
decoding the independent video layer stream based on at least one of the first plurality of random access points;
decoding the first dependent video layer stream based on at least one of the second plurality of random access points; and
synchronizing the independent video layer stream and the first dependent video layer stream to form a synchronized stream; and
generating a reconstructed video signal based on the synchronized stream.
17. The method of claim 16 , wherein decoding of the first dependent video layer stream is dependent on data from the independent video layer stream.
18. A video processing system comprising:
a mobile communication device that receives a video stream encoded into an independent video layer stream and a first dependent video layer stream that includes data that is dependent on data from the independent video layer stream wherein the independent video layer stream includes a first plurality of random access points having a first frequency, and wherein the first dependent video layer stream includes a second plurality of random access points having a second frequency, and wherein the first frequency is greater than the second frequency;
wherein the mobile communication device, in a first mode of operation, begins decoding the independent video layer stream based on at least one of the first plurality of random access points and generates a reconstructed video signal based on the independent video layer stream, without the first dependent video layer stream; and
wherein the mobile communication device, in a second mode of operation, begins decoding the first dependent video layer stream based on at least one of the second plurality of random access points, to synchronize the independent video layer stream and the first dependent video layer stream to form a synchronized stream, and to generate a reconstructed video signal based on the synchronized stream.
19. The video processing system of claim 18 wherein decoding of the first dependent video layer stream is dependent on data from the independent video layer stream.
20. The video processing system of claim 18 wherein the video stream is encoded into a second dependent video layer stream, and wherein the second dependent video layer stream includes a third plurality of random access points having a third frequency.
21. The video processing system of claim 20 wherein the first frequency is greater than the third frequency.
22. The video processing system of claim 20 wherein the second frequency is greater than the third frequency.