利用DPCM系统的改进降低PAL-M信号传输的比特率

Y. Iano, E.C. Araneda, J.B. Rickeim Filho
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引用次数: 0

摘要

作者提出了一种基于差分脉冲编码调制(DPCM)系统的原始方案,以减少图像中的冗余。许多计算机模拟结果可应用于PAL-M电视信号的复合编码。其基本思想是将量化器前后的值集中起来,得到客观和主观质量都可以接受的恢复图像。为了实现这一目标,作者研究了在传统DPCM方案的环路中使用除法器和乘法器。该方案兼顾了比特率降低效率和恢复图像质量之间的交换,获得了良好的性能
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Bit rate reduction for PAL-M signal transmission using a modification of DPCM system
The authors present an original scheme based on the DPCM (differential pulse code modulation) system for decreasing the redundancy contained in an image. Many computer simulations and the results can be applied to composite coding of PAL-M television signals. The basic idea is to concentrate the values before and after the quantizer to obtain a recovered image with acceptable objective and subjective quality. To achieve this target, the authors have investigated the utilization of a divider and a multiplier in the loop of traditional DPCM scheme. They obtained good performance of the scheme, taking into account the exchange between bit rate reduction efficiency and recovered picture quality.<>
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