Microsoft Technology Licensing, LLC

Thomson Licensing

Interdigital Vc Holdings, Inc.

Dolby Laboratories Licensing Corporation

Corel Corporation

Dolby Laboratories Licensing Corproation

Corel Software LLC

Microsoft Corporation

Zhigu Holdings Limited

Lihua Zhu

Gary Joseph Sullivan

B Anil Kumar

Peng Yin

Yongjun Wu

Jiancong Luo

Sridhar Sankuratri

Shir Aharon

Jeroen E Van Eesteren

Shyam Sadhwani

Olof L E Mases

Feng Wu

Nadim Y Abdo

Jiheng Yang

Guosheng Sun

Jizheng Xu

Sandeep Kanumuri

Costin Hagiu

Chung-Tao Chu

Richard Hua

Haihua Wu

Shipeng Li

Xiaoan Lu

Ya-Qin Zhang

Richard F Rashid

Cristina Gomila

Purvin Bibhas Pandit

Zhenyu Wu

Guobin Shen

Jun Xu

Vladimir Stoyanov

Tong L Wynn

Jayashree Sadagopan

Libo Yang

Arjun Dube

Winston M Johnston

Alp Emre Kanlikilicer

Michael E Seydl

Eric Rall

Jingyaw Sun

Winston M P Johnston

Olof LE Mases

Tong Wynn

Anil B Kumar

Innovations in the area of prediction of block vector ('By') values improve encoding or decoding of blocks using intra block copy (“BC”) prediction. For example, some of the innovations relate to use of a default BV predictor with a non-zero value. Other innovations relate to use of a selected one of multiple BV predictor candidates for a current block. Still other innovations relate to use of a skip mode in which a current intra-BC-predicted block uses a predicted BV value.

Block vector prediction in video and image coding/decoding

Innovations in encoder-side search ranges having horizontal bias or vertical bias are described herein. For example, a video encoder determines a block vector ('BV') for a current block of a picture, performs intra prediction for the current block using the BV, and encodes the BV. The BV indicates a displacement to a region within the picture. When determining the BV, the encoder checks a constraint that the region is within a BV search range having a horizontal bias or vertical bias. The encoder can select the BV search range from among multiple available BV search ranges, e.g., depending at least in part on BV values of one or more previous blocks, which can be tracked in a histogram data structure.

Encoder-side search ranges having horizontal bias or vertical bias

Innovations in syntax and semantics of coded picture buffer removal delay ('CPBRD') values potentially simplify splicing operations. For example, a video encoder sets a CPBRD value for a current picture that indicates an increment value relative to a nominal coded picture buffer removal time of a preceding picture in decoding order, regardless of whether the preceding picture has a buffering period SEI message. The encoder can signal the CPBRD value according to a single-value approach in which a flag indicates how to interpret the CPBRD value, according to a two-value approach in which another CPBRD value (having a different interpretation) is also signaled, or according to a two-value approach that uses a flag and a delta value. A corresponding video decoder receives and parses the CPBRD value for the current picture. A splicing tool can perform simple concatenation operations to splice bitstreams using CPBRD value for the current picture.

Syntax and semantics for buffering information to simplify video splicing

There are provided methods and apparatus for video usability information (VUI) for scalable video coding (SVC). An apparatus includes an encoder () for encoding video signal data into a bitstream. The encoder specifies video user information, excluding hypothetical reference decoder parameters, in the bitstream using a high level syntax element. The video user information corresponds to a set of interoperability points in the bitstream relating to scalable video coding ().

Methods and apparatus for video usability information (VUI) for scalable video coding (SVC)

Innovations in syntax and semantics of coded picture buffer removal delay ('CPBRD') values potentially simplify splicing operations. For example, a video encoder sets a CPBRD value for a current picture that indicates an increment value relative to a nominal coded picture buffer removal time of a preceding picture in decoding order, regardless of whether the preceding picture has a buffering period SEI message. The encoder can signal the CPBRD value according to a single-value approach in which a flag indicates how to interpret the CPBRD value, according to a two-value approach in which another CPBRD value (having a different interpretation) is also signaled, or according to a two-value approach that uses a flag and a delta value. A corresponding video decoder receives and parses the CPBRD value for the current picture. A splicing tool can perform simple concatenation operations to splice bitstreams using the CPBRD value for the current picture.

Innovations in the area of prediction of block vector ('BV') values improve encoding or decoding of blocks using intra block copy (“BC”) prediction. For example, some of the innovations relate to use of a default BV predictor with a non-zero value. Other innovations relate to use of a selected one of multiple BV predictor candidates for a current block. Still other innovations relate to use of a skip mode in which a current intra-BC-predicted block uses a predicted BV value.

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Lihua Zhu