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Image coding method and device

An image encoding and encoding technology, applied in the field of image processing, can solve the problem that the overall output stream size of the encoding cannot be effectively reduced

Pending Publication Date: 2021-02-26
XIAN WANXIANG ELECTRONICS TECH CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiments of the present disclosure provide an image encoding method and device, which can solve the problem that the size of the overall output code stream cannot be effectively reduced in the related art

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Embodiment Construction

[0064]Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0065] An embodiment of the present disclosure provides an image coding system, such as figure 1 As shown, the system includes: an encoder and a decoder; wherein, the encoder includes: a stream controller and a progressive encoder.

[0066] It is worth noting that the key point in the present invention is the progressive encoder, which adopts the method of double reference frames, and two con...

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Abstract

The invention provides an image coding method and device, relates to the field of image processing, and can solve the problem that the overall output code stream size of coding cannot be effectively reduced in the prior art. According to the specific technical scheme, the method comprises the steps: detecting whether a current frame is a first frame; if the current frame is the first frame, codingthe current frame according to a target code stream, and setting the first frame as a fixed-point reference frame; if the current frame is not the first frame, when the previous frame is the fixed-point reference frame, performing progressive coding on the current frame with reference to the previous frame according to the target code stream; when the previous frame is not the fixed-point reference frame, if scene switching does not occur, with reference to the fixed-point reference frame and the previous frame at the same time, performing progressive coding on the current frame according toa preset limiting code stream; and if scene switching occurs, with reference to the previous frame, progressively coding the current frame according to the target code stream, and setting the currentframe as a fixed-point reference frame. By using the mode of double reference frames, the overall output code stream size of coding can be effectively reduced.

Description

technical field [0001] The present disclosure relates to the field of image processing, and in particular to an image encoding method and device. Background technique [0002] There are two existing image coding methods. One is full frame coding, such as H.264 and H.265, and the other is progressive, which is usually implemented by a proprietary encoder, which can control the coded output stream. The first type has a problem. When the image changes too much, the output code stream is too large, which will put too much pressure on the network transmission, and it is easy to generate peaks and cause network congestion. The progressive encoding method can control the output code stream, but in the case of a good network, controlling the code stream according to the bandwidth will essentially become the first case, that is, the bandwidth is enough to transmit all layers, and all will be output. [0003] In the existing progressive encoding method of image encoding, each frame i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/172H04N19/142
CPCH04N19/172H04N19/142
Inventor 杨璐
Owner XIAN WANXIANG ELECTRONICS TECH CO LTD