Google Inc.

Google Technology Holdings LLC

Wei-Ying Kung

Limin Wang

Krit Panusopone

Xue Hai Fang

Ajay K Luthra

Koohyar Minoo

David M Baylon

Jae Hoon Kim

In a video distribution system, a divider to segment an input video stream into partitions for each of a plurality of channels of the video stream is provided. A channel analyzer is coupled to the divider wherein the channel analyzer decomposes the partitions. An encoder is coupled to the channel analyzer to encode the decomposed partitions into an encoded bitstream wherein the encoder receives coding information from at least one of the plurality of channels to be used in encoding the decomposed partitions into the encoded bitstream. A decoder receives the coded bitstream to decode the received bitstream and to reconstruct the input video stream. The decoder uses the coding information to decode the bitstream.

Method and apparatus for spatial scalability for video coding

In one embodiment, a method for encoding video data is provided that includes receiving an array of transform coefficients corresponding to a luma component or a chroma component of the video data. The method further includes encoding a significance map for the array, where the encoding includes selecting, using a shared context derivation process that applies to both the luma component and the chroma component, context models for encoding significance values in the significance map.

Simplification of significance map coding

A method, apparatus, article of manufacture, and a memory structure for encoding and decoding transform unit coefficients is disclosed. In one embodiment, the encoding of the transform unit coefficients is performed by determining if all of the coefficients of a portion of the transform unit disposed on a portion of a scan pattern are zero, setting a flag associated with the portion of the transform unit to a first value if at least one of the coefficients of the portion of the transform unit coefficients disposed on the portion of the scan pattern are non-zero, and setting the flag associated with the portion of the transform unit coefficients to a second value if all of the coefficients of the portion of the transform unit coefficients disposed in the portion of the scan pattern are zero.

Method and apparatus for last coefficient indexing for high efficiency video coding

A system includes an encoder that performs quantization on a rectangular block of quantized transform coefficients and a decoder that performs dequantization on a rectangular block of transform coefficients. The decoder is configured to receive a W&#xd7;H block of quantized transform coefficients, wherein W is a row width of the block and H is a column height of the block. The decoder is further configured to apply dequantization processing to the W&#xd7;H block of quantized transform coefficients to generate a block of transform coefficients, which are used to generate a picture corresponding to the W&#xd7;H block of quantized transform coefficients. The dequantization processing comprises applying a first dequantization algorithm when an output M of a function M=log(&#x221a;{square root over (W&#xb7;H)}) is equal to an integer value, and applying a second dequantization algorithm when the output M is equal to a non-integer value.

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San Diego, CA, United States of America

Wei-Ying Kung