Granted Patent B2

US 12,477,137 · App. 18/746,631 · Granted Nov 18, 2025

Inventors: Wenhao Zhang (Beijing, CN); Jing Cui (Beijing, CN)

Assignee: HULU, LLC

H04N19/436H04N19/105H04N19/119H04N19/159H04N19/40

Abstract

Claims (86)

1 . A method comprising:

transcoding, by a first transcoding process, a first sub-partition of a current block using a first set of reference pixels;

transcoding, by a second transcoding process, a second sub-partition of the current block using the first set of reference pixels;

transcoding, by the first transcoding process, a third sub-partition of the current block based on a second set of reference pixels; and

transcoding, by the second transcoding process, a fourth sub-partition of the current block based on a third set of reference pixels.

2 . The method of claim 1 , wherein:

the second set of reference pixels are determined based on transcoding the first sub-partition; and

the third set of reference pixels are determined based on transcoding the second sub-partition.

3 . The method of claim 1 , wherein:

transcoding the first sub-partition and transcoding the second sub-partition is performed in parallel.

4 . The method of claim 3 , wherein:

the third sub-partition and the fourth sub-partition are transcoded in parallel after transcoding the first sub-partition and the second sub-partition.

5 . The method of claim 1 , wherein:

transcoding the first sub-partition comprises:

decoding the first sub-partition to generate first decoded pixels for the first sub-partition;

generating the second set of reference pixels from the first decoded pixels for the first sub-partition;

transcoding the second sub-partition comprises:

decoding the second sub-partition to generate second decoded pixels for the second sub-partition; and

generating the third set of reference pixels from the second decoded pixels for the second sub-partition.

6 . The method of claim 1 , wherein:

transcoding the first sub-partition comprises:

generating first predicted pixels from the first set of reference pixels; and

using the first predicted pixels to transcode the first sub-partition;

transcoding the second sub-partition comprises:

generating second predicted pixels from the first set of reference pixels; and

using the second predicted pixels to transcode the second sub-partition.

7 . The method of claim 1 , wherein transcoding the first sub-partition comprises:

determining first original pixels and first predicted pixels for the first sub-partition;

generating a residual for the first sub-partition from the first original pixels and the first predicted pixels;

transcoding the first residual for the first sub-partition;

decoding the first residual for the first sub-partition to generate first decoded pixels; and

combining the first decoded pixels with the first predicted pixels for use in the second set of reference pixels.

8 . The method of claim 7 , wherein transcoding the second sub-partition comprises:

determining second original pixels and second predicted pixels for the second sub-partition;

generating a residual for the second sub-partition from the second original pixels and the second predicted pixels;

transcoding the second residual for the second sub-partition;

decoding the second residual for the second sub-partition to generate second decoded pixels; and

combining the second decoded pixels with the second predicted pixels for use in the third set of reference pixels.

9 . The method of claim 1 , wherein:

transcoding the first sub-partition comprises:

decoding the first sub-partition;

generating first predicted pixels from the first set of reference pixels; and

generating the second set of reference pixels from the decoded first sub-partition and the first predicted pixels;

and transcoding the second sub-partition comprises:

decoding the second sub-partition;

generating second predicted pixels from the second set of reference pixels; and

generating the third set of reference pixels from the decoded second sub-partition and the second predicted pixels.

10 . The method of claim 1 , wherein transcoding the first sub-partition comprises:

determining first predicted pixels from other reference pixels for another block;

generating a first residual for the first sub-partition from first encoded pixels of the first sub-partition;

generating first decoded pixels from the first predicted pixels and the first residual;

generating first predicted pixels for the first sub-partition from the other reference pixels; and

using the first predicted pixels to decode the third sub-partition.

11 . The method of claim 10 , wherein transcoding the second sub-partition comprises:

determining second predicted pixels from the other reference pixels for another block;

generating a second residual for the second sub-partition from second encoded pixels of the second sub-partition;

generating second decoded pixels from the second predicted pixels and the second residual;

generating second predicted pixels for the second sub-partition from the other reference pixels; and

using the second predicted pixels to decode the fourth sub-partition.

12 . The method of claim 1 , wherein:

the third sub-partition and the fourth sub-partition are located in between the first sub-partition and the second sub-partition.

13 . The method of claim 1 , wherein:

the second set of reference pixels are adjacent to the third sub-partition, and

the third set of reference pixels are adjacent to the fourth sub-partition.

14 . The method of claim 1 , wherein:

the second set of reference pixels and the third set of reference pixels include a first portion of pixels that are different and a second portion of pixels that are the same.

15 . The method of claim 1 , wherein:

the first set of reference pixels, the second set of reference pixels, and the third set of reference pixels include a first portion of pixels that are different and a second portion of pixels that are the same.

16 . The method of claim 1 , wherein:

the first transcoding process and the second transcoding process are different processes.

17 . A non-transitory computer-readable storage medium containing instructions, that when executed, control a computer system to be operable for:

transcoding, by a first transcoding process, a first sub-partition of a current block using a first set of reference pixels;

transcoding, by a second transcoding process, a second sub-partition of the current block using the first set of reference pixels;

transcoding, by the first transcoding process, a third sub-partition of the current block based on a second set of reference pixels; and

transcoding, by the second transcoding process, a fourth sub-partition of the current block based on a third set of reference pixels.

18 . A system comprising:

a first transcoding process operable for:

transcoding a first sub-partition of a current block using a first set of reference pixels; and

transcoding a third sub-partition of the current block based on a second set of reference pixels;

a second transcoding process operable for:

transcoding a second sub-partition of the current block using the first set of reference pixels; and

transcoding a fourth sub-partition of the current block based on a third set of reference pixels.

19 . The system of claim 18 , wherein:

the first transcoding process and the second transcoding process are different processes.

20 . The system of claim 18 , wherein:

the first transcoding process and the second transcoding process trancodes the first sub-partition and the second sub-partition in parallel.

Assignments (1)

Continuity (4)

References Cited (45)