sdtv

The main devices of the system are DSP and FPGA . It can multiplex multiple SDTV programs into one TS stream through cascade of multiple multiplexers .

该复用器以DSP和FPGA为主要器件，通过多个复用器的级联完成多路标准清晰度电视（SDTV）节目的复用。

System design and implementation of transport cascade multiplexer in SDTV

级联多节目编码复用器的设计与实现

Design and implementation of the audio encoder in SDTV are presented in this paper .

设计并实现了标准清晰度数字电视的立体声音频编码器。

Television Resolution of SDTV System and HDTV System

SDTV和HDTV系统的分解力

An implementation of SDTV source decoder based on ASIC is presented in this paper .

所开发的SDTV机顶盒以ST公司的STi5518芯片为核心芯片，具有硬盘录像和有条件接收接口.本文实现了以专用芯片STi5518为核心器件的SDTV信源解码器。

Design and Implementation of Video Capture IP for SDTV STB

标清数字电视图像截取引擎IP核的设计与实现

Research and Implementation of Video Coding from HDTV to SDTV in the DCT Domain

高清到标清DCT域视频转码的研究与实现

Design and implementation of a realtime transport cascade multiplexer in SDTV are discussed .

设计并实现了一种可级联的实时多节目复用器。

Design of HDTV / SDTV Transport Stream Player

HDTV/SDTV节目传输流播放机设计

Research on Technique of Transcoding from HDTV to SDTV

HDTV到SDTV转换编码技术的研究

The Design and Implement of a Delaying Broadcasting System for SDTV Signal Based on a FPGA + DDR Platform

基于FPGA+DDR平台的标清电视信号延迟播出系统设计及实现

This thesis is focused on transcoding from HDTV to SDTV .

本课题重点研究HDTV到SDTV转换编码问题。

Category , Birth and Pronunciation of HSK and SDTV

略论HSK、SDTV的归属、产生和读音

MPEG-2 standard is suit of high quality digital video compression , and plays an important role in the HDTV , SDTV and DVD fields .

MPEG-2图像压缩标准适用于高质量数字视频压缩，在HDTV、SDTV和DVD等标准中有着重要的地位。

But due to the lack of HDTV program resources nowadays in our country , consumers would undoubtedly prefer STBs that also support SDTV signals .

同时由于中国当前高清电视节目资源的不足，向下兼容标清电视信号的机顶盒无疑会更受消费者的喜爱。

SDTV and HDTV of Digital Terrestrial Television Broadcasting in Dual Chinese Standards Accelerate the Appliance of DTMB Promote the Development of the DTV Industry

地面数字电视广播的双国标SDTV和HDTV加快地面数字电视国家标准应用推动数字电视产业发展

Xiao Liu is astudent of SDTV university .

小刘是山东电视大学的学生。

In this paper , a Set-top Box system based on one VLSI chip is introduced , which can receive DVB-S and DVB - C SDTV signal .

文中介绍基于单片VLSI芯片、可以同时接收卫星和有线电视节目信号的机顶盒实现方案。

At present , digital television , digital TV set-top boxes have been provided by the business of SDTV and HDTV and data broadcasting , e-government .

目前，在数字电视方面，数字电视机顶盒已经提供的业务有标清电视和高清电视以及数据广播、电子政务。

Since a transition from analog to digital television is taking place in china , the research and development of the standard definition TV ( SDTV ) STB have great importance and significance .

标准清晰度数字电视（SDTV）机顶盒的研究与开发具有重要的社会意义。

The operation results indicate that the storage subsystem can satisfy not only the demand of the uncompressed digital playing system for SDTV , but also the demand of the digital playing system for HDTV .

运行结果表明，此存储子系统不仅很好地满足了标准清晰度电视无压缩数字播放系统的要求，而且也可满足高清晰度电视数字播放系统的要求。

Because of the high cost of HDTV production , and a large number of Standard-Definition Television programs can not be discarded , how to convert SDTV to HDTV has become a key issue .

由于制作HDTV成本高，而原有大量的标清度数字电视（SDTV）节目不能丢弃，如何把原有的SDTV转换成HDTV就成为一个关键问题。

The cross division method is used in the video encoder and decoder of the first generation HDTV function prototype in China , so as to implement HDTV encoder and decoder by using SDTV encoder and decoder chips .

我国自行研制的第一代高清晰度电视功能样机视频编、解码器中，采用十字划分方案，以便使用标准清晰度电视视频编、解码芯片实现高清晰度电视视频编、解码器。

It suit well to the MPEG-2 TS output , decode and display system , meeting the demand on the range of frequency , step precision and stabilization of SDTV and HDTV TS. It can decode and play normally .

与MPEG-2TS输出、解码、显示系统联调，可满足SDTV（标准清晰度电视）和HDTV（高清晰度电视）TS对频率范围、步级精度、稳定度等的要求，解码、播放正常。

There are a large number of repetitive calculations in the section of the conversion from SDTV to HDTV . If the system is processed with traditional CPU , only the concurrency of multi-threaded can be used to reduce the repetitive calculation .

系统设计初期是基于多核的CPU，从SDTV到HDTV的转换环节存在大量的重复性运算，如果用传统的CPU处理，只能通过多线程的并发性来降低整个过程的重复性计算。

The HDTV video encoder can only be implemented by several SDTV video encoding chips for the rea-son of current hardware limitations . The allocation of bitrate of the SDTV encoders will affect the picture quality of the encoder .

由于现存硬件条件的局限，高清晰度电视视频编码器的硬件实现只能通过数片SDTV级的编码芯片来完成，其子编码器的码率分配会影响整个编码器的图像编码质量。

This paper studies the key techniques of transcoding in the DCT domain , including picture downsizing , motion compensation and reusing of motion vectors in the original video . The transcoding from HDTV to SDTV is implemented on PC in a way of software .

研究了DCT域中空间分辨率下采样的关键技术，包括DCT域图像尺寸下采样、DCT域的运动补偿、运动矢量重用等，并以软件方式实现了HDTV到SDTV的转码。

However , SDTV / HDTV is a compute-intensive task . And the performance improvement brought by the use of multi-thread which distributes computing tasks to different CPU core will depend on the number of CPU cores . So the effect of this optimization is limited .

然而SDTV/HDTV是计算密集型任务，而且使用多线程来将计算任务分配不同CPU核心所带来的性能提升将会依赖于CPU核心数量，所以这种优化的效果是有限的。

At present , most digital TV programs played by television stations are Standard Definition Television ( SDTV ), but the pace of technology has not slowed , and in the near future , SDTV will surely be replaced by High Definition Television ( HDTV ) which is more advanced .

目前播放的数字电视多数是标准清晰度数字电视，但是数字电视的发展并未停止，在不久的将来，高清晰度数字电视必将取代标准清晰度数字电视。