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Video encoding/decoding method and device using synthesized reference frame

A video codec and reference frame technology, which is applied in the field of digital video compression codec to achieve the effect of improving subjective quality, good noise, and improving coding efficiency

Active Publication Date: 2008-09-24
华雁智能科技(集团)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The patent application number 200710071114.5 "Video Coding Method Using Dynamic Background Frame" disclosed by the inventor discloses a video coding method using a dynamic background frame as a reference frame. This method has a better effect on noisy background image areas. Performance, but because it only targets noisy background image areas, it must be used with traditional reference frames to obtain better overall encoding performance

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  • Video encoding/decoding method and device using synthesized reference frame
  • Video encoding/decoding method and device using synthesized reference frame
  • Video encoding/decoding method and device using synthesized reference frame

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Embodiment 1

[0059] Embodiment 1: A video coding method and device using synthetic reference frames

[0060] The video encoding method using synthetic reference frames proposed by the present invention, combined with the attached figure 1 , 2 , 4 The details are as follows:

[0061] 1) At the beginning of encoding, two frame memory SRM0 and SRM1 need to be allocated for the synthetic reference frame. The frame memory size is the size of one frame of data. Among them, SRM0 is used to update the synthetic reference frame, storing the synthetic reference frame without deblocking filter, and each synthetic reference frame can reuse one SRM0; SRM1 is used to store the synthetic reference frame after deblocking filtering, which can be directly used in the frame time forecast.

[0062] 2) A frame of image is read in, if the current coded frame is an I frame, then the synthetic reference frame frame memory SRM0 is updated as the reconstructed frame of the current frame without deblocking filte...

Embodiment 2

[0072] Embodiment 2: Another video coding method and device using synthetic reference frames

[0073] A video coding method using a synthetic reference frame, combined with an attached figure 1 , 3 , 5 The details are as follows:

[0074] 1) At the beginning of encoding, it is necessary to allocate a reference frame stack composed of n frame memory for the synthetic reference frame. The number of frame memory can be determined according to the needs. Multiple frame memory is used to support multi-reference frame prediction, and an SR frame buffer is set SRM0. The frame memory size is the size of one frame of data.

[0075] 2) Read in a frame of image, if the current coded frame is an I frame, perform traditional intra-frame coding on it, and update the content in the synthetic reference frame buffer SRM0 to the reconstructed frame of the current frame without deblocking filtering. Go to step 5).

[0076] 3) If the current coded frame is a forward prediction frame (P frame...

Embodiment 3

[0085] Embodiment 3: A video decoding method and device using synthetic reference frames

[0086] The video decoding method utilizing synthetic reference frames proposed by the present invention is described in detail as follows in conjunction with accompanying drawings 6, 7, and 8:

[0087] The process of generating and updating the synthetic reference frame in this embodiment is the same as that in Embodiment 1, except that the reconstruction value of the macroblock and the motion vector are obtained through video decoding, which is exactly the same as that at the encoding end.

[0088] As shown in Figure 6, the present invention utilizes a video decoding device for synthesizing reference frames, which has motion compensation and intra-frame prediction, entropy decoding, inverse transformation and inverse quantization, deblocking filtering, reconstructed frame storage, and synthetic reference frame generation modules. unit. The synthetic reference frame generating module in...

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Abstract

The invention discloses a video coding and decoding method and a device using a synthetic reference frame, which uses coded image information as the reference frame and code and decodes the image frame of a successive code. The reference frame includes the synthetic reference frame which is reset and renewed by a reconstructive frame in each frame and then renewed by the reconstructive image information of a following inter-frame prediction frame according to a macro-block or a sub block of the macro-block. The renewed synthetic reference frame is used as a reference frame for the prediction during the coding of the successive image frame and is renewed continuously. The video coding and decoding method and the device of the invention can increase the accuracy of the video sequence motion estimation in video monitoring, reducing prediction errors and improving coding efficiency without the increasing of the complexity.

Description

technical field [0001] The invention belongs to the technical field of digital video compression coding and decoding, and relates to a method for video coding and decoding with motion compensation inter-frame prediction, and a video coding device and a video decoding device using the method, especially using a new synthetic reference frame as a frame The reference frame of the inter-prediction codec replaces or partially replaces the traditional reference frame. Background technique [0002] Video surveillance is a core component of the security industry. Since the security industry has a low bit rate for interconnection between systems and an urgent need for a large amount of video information storage, with the expansion of the video surveillance scale, a large number of The transmission and storage of video information requires large-capacity network communication and disks, and the cost is very high. In video surveillance, the cameras for collecting video images are eith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50H04N7/32H04N7/18H04N19/105
Inventor 唐慧明张玉洁虞露刘云海卢超楼洛阳戚华飞
Owner 华雁智能科技(集团)股份有限公司
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