Google Inc.

Arris Enterprises LLC

Shiv Saxena

Peter A Borgwardt

Mayer D Schwartz

Brenda Van Veldhuisen

Sean Thomas McCarthy

Vijay Kamarshi

Wayne D Michelsen

Fabrice M Quinard

Pierre Seigneurbieux

Shivkumar Jayaraman

Venkatram Vajjhula

Sean T Mccarthy

A dual-pass rate control video encoder including a first pass encoder module configured to receive uncompressed input video including a sequence of pictures, the input video including a plurality of contiguous sequences of pictures each referred to as a Group of Pictures (GOP) that, when coded, begin with an I-picture in display order and end with a last picture before a next I-picture, detect scene changes within the input video. The dual-pass rate control video encoder including a second pass encoder module configured to receive the uncompressed input video via a delay unit.

Apparatus for dual pass rate control video encoding

A video processing system is provided to create quantization data parameters based on human eye attraction to provide to an encoder to enable the encoder to compress data taking into account the human perceptual guidance. The system includes a perceptual video processor (PVP) to generate a perceptual significance pixel map for data to be input to the encoder. Companding is provided to reduce the pixel values to values ranging from zero to one, and decimation is performed to match the pixel values to a spatial resolution of quantization parameter values (QP) values in a look up table (LUT). The LUT table values then provide the metadata to provide to the encoder to enable compression of the original picture to be performed by the encoder in a manner so that bits are allocated to pixels in a macroblock according to the predictions of eye tracking.

Method of bit allocation for image and video compression using perceptual guidance

A method of dual-pass rate control video encoding and an encoder are disclosed. Uncompressed input video is received with a video encoder. First pass encoding is performed, and a second pass encoding is performed with the video encoder at a delay relative to the first pass. The first pass encoding detects scene changes within the input video, assigns macroblocks to a pre-determined number of activity classes, and determines a complexity of each picture within the sequence of pictures. Information from the first pass encoding concerning the scene changes, the activity classes, and the complexity are used for rate control determined in second pass encoding for producing and outputting a bit stream of compressed video. During at least one of the first pass and second pass encoding, boundaries of at least some of the GOPs are adjusted to be aligned with the scene changes.

Method for dual pass rate control video encoding

A method for processing a video stream includes receiving first and second copies of the video stream by first and second video processing devices, respectively, and generating first and second statistical data for the video stream by the first and the second video processing devices, respectively. The method further includes transmitting in first and second transmissions the first and the second copies of the video stream with the first and the second statistical data respectively from the first and the second video processing device to a third video processing device, and reading the first and the second statistical data from the first and the second transmissions by the third video processing device. The method further includes combining the first and the second statistical data with one copy of the video stream by the third video processing device, and transmitting the one copy of the video stream with the first and the second statistical data.

Distribution and use of video statistics for cloud-based video encoding

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Portland, OR, United States of America

Shiv Saxena