数字电视系统中量化失真对微分增益和微分相位的影响

李乐民

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数字电视系统中量化失真对微分增益和微分相位的影响

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- 数字电视系统中量化失真对微分增益和微分相位的影响
- The Effect of Quantization Distortion on the Differential Gain and Differential Phase in Digital TV Systems
- 电子学报 1987年第3期页码：38-45
- 作者机构：
  
  成都电讯工程学院
- 作者简介：
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- 纸质出版：1987
- 稿件说明：
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[1]李乐民.数字电视系统中量化失真对微分增益和微分相位的影响[J].电子学报,1987(03):38-45.

Li Le-min. The Effect of Quantization Distortion on the Differential Gain and Differential Phase in Digital TV Systems[J]. Acta Electronica Sinica, 1987, (3): 38-45.
[1]李乐民.数字电视系统中量化失真对微分增益和微分相位的影响[J].电子学报,1987(03):38-45. DOI：

Li Le-min. The Effect of Quantization Distortion on the Differential Gain and Differential Phase in Digital TV Systems[J]. Acta Electronica Sinica, 1987, (3): 38-45. DOI：

摘要

本文分析了数字彩色电视系统中量化失真对微分增益（DG）和微分相位（DP）的影响。考虑了两种情况:其一是取样频率与彩色副载波频率为非同步的

其二是取样频率为副载波频率的三倍。对前一情况

得到了计算DG的精确式和近似式。对后一情况

从所得DG、DP计算式易得知取样脉冲相位的影响。最后讨论了减小量化失真引起测量误差的措施。

Abstract

The effect of quantization distortion of the differential gain（DG）and differential phase （DP） in digital color TV systems is analysed. Two cases are taken into account. One is that the sampling frequency and the color subcarrier frequency are non-synchronized and the other is that the sampling frequency is three times the subcarrier frequency. For the former case

exact and approximate formulas for calculating DG are obtained. For the latter case

the influence of sampling phase can easily be seen from the calculated formulas of DG and DP. Methods of reducing measuring error caused by quantization distortion are discussed.

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