Slice-level reference picture reconstruction

A reference image and image technology, applied in the field of video coding, can solve problems such as failure to reach the decoder, data loss or noise sensitivity, and missing images at the decoder.

Active Publication Date: 2019-12-10
AGORA LAB INC
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  • Application Information

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Problems solved by technology

However, one of the disadvantages of data compression is that the compressed media data is very sensitive to data loss or noise, and data loss or noise often occurs in best-effort networks.
For example, in some cases, network jitter can cause packet loss or delays in reaching the decoder, resulting in missing images or parts of images at the decoder
In addition, lost data packets may contain information needed to decode other images (for example: partial information of reference images), thus further affecting the decoding process
Reliable media data transmission over noisy networks becomes more challenging as end-user devices and network environments become more diverse

Method used

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Embodiment Construction

[0016] Online multimedia data sharing, such as video conferencing, real-time streaming video broadcasting, or Internet telephony services, all require high-efficiency and high-fidelity media data transmission. Media data may include audio data, video data, or any multimedia data comprising audio sequences or video sequences. Often media data can be stored in its original form or converted into a media stream. The video stream may be encoded (or "compressed") into a compressed video stream (eg, a video bitstream) for transmission over the network. Compressed video streams can be transmitted over the network in packets (or simply "packets").

[0017] When encoding a video stream (also referred to as a "video sequence"), one picture of the video stream may be encoded using motion estimation (ME) and motion compensation (MC). For example, when decoding a picture, another picture can be used as a reference (called a "reference picture"). The reference picture can be an I picture...

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Abstract

The present invention provides a method for encoding a video stream. The method for encoding a video stream, includes the steps of: encoding, by a processor, a first slice of a first picture of the video stream; receiving, from a decoder, a feedback message indicative of having received the first slice of the first picture; and in response to receiving the feedback message indicative of having received the first slice of the first picture, setting the first slice of the first picture as a reference slice for encoding a second picture of the video stream, wherein the second picture is encoded after receiving the feedback message.

Description

technical field [0001] The invention relates to video coding technology, and its specific field is to realize video coding with good anti-packet loss performance by using sliced ​​reference image reconstruction technology. Background technique [0002] In the past few decades, the development of data compression technology has reduced the huge bandwidth required for media (audio, video or multimedia) data transmission. For example, reference images are used in modern video coding standards for motion estimation (ME) and motion compensation (MC) to reduce inter-frame redundancy. However, one disadvantage of data compression is that compressed media data is very sensitive to data loss or noise, and data loss or noise often occurs in best-effort networks. For example, in some cases, network jitter can cause packet loss or delays in reaching the decoder, resulting in missing images or parts of images at the decoder. In addition, the lost data packets may contain information re...

Claims

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Application Information

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IPC IPC(8): H04N19/164H04N19/174H04N19/85
CPCH04N19/164H04N19/174H04N19/85H04N19/58H04N19/68H04N19/105H04N19/65
Inventor 钟声戴伟庄泽森
Owner AGORA LAB INC
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