Zhejiang University

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Huawei Technologies Co., Limited

Hualong Yu

Lu Yu

Zhihuang Xie

Zhenyu Dai

Ye-Kui Wang

Haitao Yang

Yin Zhao

Yuqun Fan

Xiaoding Gao

Bingjie Zhu

Qichao Yuan

Yuchao Shao

Xiangyu Lin

Yaqing Pan

Embodiments of the disclosure provide an encoding method, a decoding method, an encoder, a decoder, and a storage medium. The method includes the following. An encoding result of a current block, a target index for the current block, and a block-coding enable flag for the current block are obtained by parsing a bitstream. A feature map splicing order is obtained. When the block-coding enable flag is valid, target block-coding motion information corresponding to the target index is determined based on the feature map splicing order and pixel position information of the current block. The encoding result of the current block is decoded based on the target block-coding motion information.

Encoding method, decoding method, and decoder

An encoding method, a decoding method, an encoder, a decoder, and a storage medium are provided. The encoding method comprises: determining input feature map data (S); performing relevant processing on the input feature map data to obtain a plurality of feature sub-maps (S); reordering the plurality of feature sub-maps to obtain a quasi time domain sequence and corresponding reordering information (S); and encoding the quasi time domain sequence and the reordering information to generate a bitstream ().

Encoding and decoding methods using input feature map processing for quasi time domain sequence

A feature data encoding method is provided. First feature data corresponding to each of channels to be encoded is determined; data type conversion processing is performed on the first feature data corresponding to each channel to obtain second feature data that meets a data input condition of an apparatus for encoding feature data; spatial re-expression is performed on the second feature data corresponding to each channel to obtain third feature data, wherein a height of the third feature data is a first height, a width of the third feature data is a first width, and the third feature data comprises the second feature data located at a target position of each of the channels; and the third feature data is encoded and signalled in a bitstream.

Feature data encoding method, apparatus and device, feature data decoding method, apparatus and device, and storage medium

Methods to produce media data ensure a method for media data transmitting, and a method for media data processing, and the synchronization and correct processing and transmission of bitstreams on the basis of dependency relation between video layer bitstream and library layer bitstream, and correct bitstream is highly efficiently provided to a decoder. With methods for reference picture request processing and reference picture specifying, a current picture includes a library picture set in which the library picture does not belong to the random access segment to which the current picture belongs and the previously most adjacent random access segment, and correct decoding of the current picture is ensured and repeated downloading of library pictures is avoided, thus ensuring the correct decoding and highly efficient transmission of a bitstream produced by library-based video coding method, and increasing transmission efficiency and storage efficiency.

Methods and apparatus for media data processing and transmitting and reference picture specifying

A method of bitstream verifying includes at the encoder side, the coded picture data of a spliced bitstream, containing a library bitstream and a main bitstream, is processed by different operations in the hypothetical bitstream buffer to simulate the data fulfillment level of the bitstream buffer. This is used to check whether the hypothetical bitstream buffer is overflowed or underflowed and verify the qualification of the bitstream. A method of managing bitstream at the decoder side is exploited to decode the library picture, which is inserted in the spliced bitstream, at a proper time. This ensures that a bitstream buffer with a limited capacity neither overflows nor underflows and the decoder can decode and present the picture of the main bitstream at a proper temporal order, which avoids lag of the main bitstream picture and waste of the decoded picture buffer.

Methods and apparatus of bitstream verifying and decoding

Disclosed are multiple methods and multiple apparatus e media data, and multiple methods and multiple apparatus for media data transmitting, media data processing, reference picture request processing and reference picture specifying. By means of the method to produce media data, the method for media data transmitting, and the method for media data processing, the synchronization and correct processing and transmission of bitstreams are ensured on the basis of dependency relation between video layer bitstream and library layer bitstream, and correct bitstream is highly efficiently provided to a decoder. By means of the method for reference picture request processing and reference picture specifying, a current picture is provided with a library picture set in which the library picture does not belong to the random access segment to which the current picture belongs and the previously most adjacent random access segment, and correct decoding of the current picture is ensured and repeated downloading of library pictures is avoided, thus ensuring the correct decoding and highly efficient transmission of a bitstream produced by library-based video coding method, and increasing transmission efficiency and storage efficiency.

A video encoding method, a video decoding method, an apparatus, a device, and a storage medium include parsing a first flag from the video bitstream when a video bitstream is allowed to be decoded by referencing a library picture corresponding to a library picture bitstream, using a value of a target parameter of the video bitstream as a value of a target parameter of the library picture bitstream referenced by the video bitstream when a value of the first flag is a first value, and reconstructing, based on the value of the target parameter of the library picture bitstream referenced by the video bitstream and the library picture bitstream referenced by the video bitstream to obtain the library picture corresponding to the library picture bitstream referenced by the video bitstream.

Video coding and decoding methods and devices using a library picture bitstream

A decoding method includes obtaining an identifier from a bitstream, where the identifier indicates a minimum decoding time interval k between library pictures that is allowed in the bitstream, obtaining, when parsing the bitstream, a decoding moment tof a current decoded picture and a decoding moment tof a first decoded picture that is closest to the current decoded picture and that references a new library picture when the current decoded picture is decoded by referencing a library picture, where the new library picture is a library picture that is not decoded or needs to be re-decoded when the first decoded picture is decoded, and determining a preset quantity of library pictures as candidate reference pictures of the current decoded picture based on a relationship between k and a difference between tand t.

Growing community of inventors

Hangzhou, China

Hualong Yu