摘要
高清晰度电视（ＨＤＴＶ）采用了先进的信源压缩编码技术和信道编码技术，它在继承现有模拟电视技术的基础上将逐步取代现存的模拟电视制式电视。研制中的我国 ＨＤＴＶ信源编码采用国际流行的 ＭＰＥＧ Ⅱ视频压缩技术，信道编码采用 ８电平残留边带（ＶＳＢ）调制，２／３速率的ＴＣＭ编码和能纠正 １０位错误的ＲＳ码组成的前向纠错码，同时采用前向７８节、后向１７７节的自适应信道均衡器，它还利用梳状滤波器来抑制 ＰＡＮ－Ｄ的同频干扰。本文介绍了利用锁频锁相环对 ＨＤＴＶ中 ＶＳＢ传输系统进行载波恢复的原理和方法，并介绍了一种具体的硬件实现方案。
Advanced signal source compression and channel coding techniques are used for high definition television (HDTV). Based on analogy TV technique, it will gradually take the place of traditional analogy TV system. Being researched in our contry's HDTV, signal source. ceding techniques adopted moving picture experts group (MPEG-Ⅱ) video compression and channel coding techniques used eight-level vestigial sideband modulation (VSB) with ho-thirds rate trellis coding (TIM) and Reedsolomon (RS) ceding which can detect 10 bit error for forward error correction. Furtherrmore, adaptive channel equalizers with forward 78 taps and backword 177 taps are used. Also, it employed comb filter in order to reject PAID CO-channel interferenced. This paper Introduces the principle and approach of carrier recovery of vestigial sideband transmission system in high definition television applying for frequency and phase lock loop. In addition, it describes a kind of concrete scheme of hardware implementation.
出处
《浙江工业大学学报》
CAS
1998年第1期7-11,共5页
Journal of Zhejiang University of Technology
基金
国家九.五攻关项目
