VCR Implementation Based on GOP Fetching and Variable Frame Rate

ZHOU Jun; LI Jun; ZHU Ming

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VCR Implementation Based on GOP Fetching and Variable Frame Rate

更新时间：2025-07-16

- VCR Implementation Based on GOP Fetching and Variable Frame Rate
- Acta Electronica Sinica Vol. 37, Issue 8, Pages: 1675-1680(2009)
- 作者机构：
  
  中科院网络传播系统与控制重点实验室,安徽省网络传播系统与控制重点实验室,安徽,合肥,230027
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP391
- Published：2009
- 稿件说明：
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ZHOU Jun, LI Jun, ZHU Ming. VCR Implementation Based on GOP Fetching and Variable Frame Rate[J]. Acta Electronica Sinica, 2009, 37(8): 1675-1680.
DOI：

ZHOU Jun, LI Jun, ZHU Ming. VCR Implementation Based on GOP Fetching and Variable Frame Rate[J]. Acta Electronica Sinica, 2009, 37(8): 1675-1680. DOI：

摘要

MPEG编码视频帧间存在解码依赖性

导致VCR操作尤其是快进快退

需要服务端传送大量解码依赖帧.目前的VCR实现方法在解决这种依赖传输现象时

系统资源消耗与机顶盒解码复杂度非常高.本文提出一种基于GOP取帧与变帧率的VCR实现方法

基于GOP取帧消除依赖传输从而降低快进快退码率

可降到正常播的22%.变帧率实现码率可定制的效果

满足不同链路需求.该方法无需预处理视频

可作为在线算法应用于实时视频系统.

Abstract

Due to the decoding dependency of MPEG coded frames

now existing methods on VCR implementation have to face the problem of how to settle the transmission of extra frames caused by this decoding dependency which would brought in heavy resource consumption and high STB decoding complexity. To tackle the problem

based on GOP (Group-of-Pictures) fetching and variable frame rate (VFR)

our VCRimplementation method called G-VFR is proposed. GOP based frame-fetching can effectively eliminate the dependency transmission

and VFR leads to optional transmission rate. The experimentation results demonstrate that G-VFR can reduce the transmission rate of fast-scan operations to 22% of that of normal playback

and the VFR character can be achieved by parameter adjusting

meanwhile G-VFR can be used in real-time streaming system such as Time-Shifted TV.

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Survey of Key Technologies of the Distribution System for Streaming Media

Efficient Global Motion Estimation Method for MPEG Video

Research Advances in Key Technology of Video Streaming

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