US 12,701,237 B2 · Encoder and decoder, encoding method and decoding method with profile and level dependent coding options

Abstract

A video encoder according to embodiments is provided. The video encoder is configured for encoding a plurality of pictures of a video by generating an encoded video signal, wherein each of the plurality of pictures includes original picture data. The video encoder includes a data encoder configured for generating the encoded video signal including encoded picture data, wherein the data encoder is configured to encode the plurality of pictures of the video into the encoded picture data. Moreover, the video encoder includes an output interface configured for outputting the encoded picture data of each of the plurality of pictures. Furthermore, a video decoders, systems, methods for encoding and decoding, computer programs and encoded video signals according to embodiments are provided.

Claims12

Dependent claims

A method for decoding a picture from a data stream, the method comprising:

decoding, from the data stream, a chroma format information describing how chroma of the picture is sampled;
determining a motion vector corresponding to a chroma subblock of the picture, wherein:
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:4:4 format, determining the motion vector corresponding to the chroma subblock based on motion vector information corresponding to one luma subblock,
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:2:2 format, determining the motion vector corresponding to the chroma subblock based on averaging motion vector information corresponding to two luma subblocks in one dimension, and
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:2:0 format:
determining the motion vector corresponding to the chroma subblock based on (i) selecting a top-left luma subblock and a bottom-right luma subblock and (ii) averaging motion vector information corresponding to the selected luma subblocks;
and
reconstructing the picture based in part on the determined motion vector corresponding to the chroma subblock.

5 more elements

An electronic device for decoding a picture from a data stream, the electronic device comprising:

a processor including processing circuitry configured to:
decode, from the data stream, a chroma format information describing how chroma of the picture is sampled;
determine a motion vector corresponding to a chroma subblock of the picture, wherein:
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:4:4 format, the processor is configured to determine the motion vector corresponding to the chroma subblock based on motion vector information corresponding to one luma subblock,
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:2:2 format, the processor is configured to determine the motion vector corresponding to the chroma subblock based on averaging motion vector information corresponding to two luma subblocks in one dimension, and
in response to the chroma format information indicating that the chroma subblock is sampled in a 4:2:0 format, the processor is configured to determine the motion vector corresponding to the chroma subblock based on (i) selecting a top-left luma subblock and a bottom-right luma subblock and (ii) averaging motion vector information corresponding to the selected luma subblocks;
and
reconstruct the picture based in part on the determined motion vector corresponding to the chroma subblock.

5 more elements

Dependencies are inferred from the claim text.

Encoder and decoder, encoding method and decoding method with profile and level dependent coding options

Life of this patent

Encoder and decoder, encoding method and decoding method with profile and level dependent coding options

Life of this patent

Abstract

Claims12