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Partial video decoding method, device and system

A technology for video and video streaming, which is used in digital video signal modification, selective content distribution, image communication, etc., and can solve problems such as low resolution

Active Publication Date: 2019-06-14
KONINK KPN NV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a need in the art to enable decoding of video data at native resolution by a video decoder that is limited to a lower resolution of one of the entire source content

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  • Partial video decoding method, device and system
  • Partial video decoding method, device and system
  • Partial video decoding method, device and system

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Embodiment Construction

[0043] For the purposes of the present invention, the term video stream, when including encoded video data, refers to a bit stream which is the intended input of a decoder device. For example, it is intended to parse a bitstream for the purpose of decoding encoded video data embedded within it. This interpretation is consistent with what the term "bitstream" is understood in the technical field of encoding.

[0044] figure 1 An exemplary video delivery system is shown, including a network 10, a network source system 12, and a network destination system 14. Network source 12 includes storage system 120 , controller 122 and network interface 124 . Storage system 120 stores data representing encoded video streams. For example, the encoded video bitstream may be an HEVC encoded video bitstream. HEVC uses slices, which are portions of a video stream that are encoded independently of each other. In the described embodiment, slices are used such that each slice is associated wit...

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Abstract

Encoded video data representing partial video images is decoded from a first video stream such as a HEVC bitstream. The first video stream comprises video images divided into a spatial array of independently decodable slices. The first video stream comprises network abstraction layer units that each contain video content data for a respective one of the slices preceded by a header that comprises parameters relating to the respective one of the slices in relation to the first video stream. Previously prepared information such as meta data about positions of parameters in the network abstractionlayer units or a plurality of different versions of the network abstraction layer units for different partial image sizes (different picture sizes) is used. The meta data may be used for partially rewriting the network abstraction layer units for a subarray of slices, the network abstraction layer units being rewritten at a location selected on the basis of meta data, to make the network abstraction layer units consistent with a second video stream of encoded video data only for the sub-array of slices. Versions of the network abstraction layer units may be selected for the sub-array of slices, from the plurality of different versions. Subsequently, the partial video images are generated by decoding the encoded video data from the rewritten network abstraction layer units.

Description

technical field [0001] The present invention relates to a video information transmission method and system, a video decoder, a video encoder and a video encoding and decoding method. Background technique [0002] WO2015197818 discloses the use of HEVC tiles to render video data from a user selectable spatial viewport into a larger video image, such as a panoramic video image, eg for display on a head mounted device. The HEVC standard (High Efficiency Video Coding) provides the use of tiles and slices to facilitate the decoding of video data using multi-core processors in decoder systems. A tile corresponds to a respective spatial region of a video image for which video data is independently coded. Thus, different decoder units running on different processor cores can be assigned to decode different tiles (in HEVC terminology, a unit that decodes tiles is called a "decoder", but as used in this document, The term "decoder" also covers multiple HEVC decoders for different ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/4728H04N21/2343H04N19/167H04N19/174H04N19/40H04N19/88
CPCH04N21/2343H04N21/4728H04N19/174H04N19/167H04N19/88H04N19/40H04N19/119H04N19/188H04N19/46
Inventor M.邦玛R.万布兰登布格A.文希赞
Owner KONINK KPN NV
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