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Hybrid distributed video encoding method based on intra-frame intra-frame mode decision

A technology of distributed video and intra-frame mode, applied in the field of hybrid distributed video coding based on intra-frame mode decision-making

Inactive Publication Date: 2008-12-31
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Claims
  • Application Information

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Problems solved by technology

However, the rate-distortion performance of residual DVC still needs to be further improved

Method used

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  • Hybrid distributed video encoding method based on intra-frame intra-frame mode decision
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  • Hybrid distributed video encoding method based on intra-frame intra-frame mode decision

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Embodiment Construction

[0059] The HDVC system based on intra-frame mode decision-making proposed by the present invention can be completed by software or by hardware systems such as DSP, parallel machine with SIMD or MIMD structure, and the like.

[0060] exist figure 1 Among us, we provide a hardware implementation block diagram of HDVC proposed by the present invention, wherein the camera can be a mobile phone camera, a video input terminal of some low-energy equipment such as a sensor network camera, and is responsible for the collection of the original video image; the video after collection is frame by frame Compression encoding by a "low complexity encoder"; all frames in a GOP are stored in memory. The compressed code stream passes through the transmission network, where the network can be a wired or wireless network; at the receiving end, the received code stream is decoded frame by frame by a "high-complexity decoder" and displayed.

[0061] Encoder block diagram as figure 2 As shown, th...

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Abstract

A hybrid distributed video encoding method based on wavelet domain intra-frame mode decision capable of improving rate aberration performance, is characterized by the following steps: (1) a low complexity encoding, including the following steps: using traditional intra-frame encoder to code key frames, generating the reference frame of Wyner-Ziv frame by weighted average interpolation, generating a residual frame by a subtraction arithmetic, performing discrete wavelet switch DWT to the residual frame, generating a wavelet block, intra-frame mode decision of the wavelet block, entropy coding of the mode information, and inter-frame SW-SPIHT coding or intra-frame SPIHT coding of the wavelet block; (2) a high-complexity decoding, including the following: using traditional intra-frame decoding algorithm to decode key frames, adopting a motion estimation interpolation to produce side information frame of the Wyner-Ziv, generating the reference frame of the decoding terminal by weighting average interpolation, generating a residual frame of the decoding terminal by a subtraction arithmetic, performing DWT to the residual frame, entropy decoding of the mode information, adopting LBS to perform motion estimation to generate more accurate side information, fine reconstruction of wavelet coefficients, and recovering the original pixels by inverse discrete wavelet transform (IDWT) and addition operations.

Description

technical field [0001] The application of the present invention belongs to the field of video coding methods, in particular to a hybrid distributed video coding method based on intra-frame mode decision that can improve rate-distortion performance. Background technique [0002] Distributed Video Coding (DVC) is a novel video coding framework newly developed in recent years. Compared with other mature video compression technologies (such as MPEG series, H.26* series, etc.), DVC has the advantages of "low-complexity coding" and a certain degree of robustness, and is suitable for emerging video applications that require "friendly upload". Video communication services (such as mobile photography, wireless sensor networks, network video surveillance, etc.). DVC uses the Slepian-Wolf and Wyner-Ziv side information source coding theories in the information theory of the 1970s, trying to realize the distributed source coding mode of "separate coding and joint decoding" of adjacent ...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N19/159H04N19/61H04N19/625H04N19/63
Inventor 王安红李志宏张雄郑义
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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