电视节目后期制作中的多媒体技术的应用(国外英文资料).docVIP

电视节目后期制作中的多媒体技术的应用(国外英文资料) The application of multimedia technology in later production of TV programs Multimedia is digital technology as the core of AV (audio, image) and CC (computer, communication) the floorboard of the integrated information environment, multimedia technology has been widely applied in areas such as business, education, electronic publishing. In TV production, multimedia technology with the advantages of the digital processing, the traditional way of record, weaving, seeding production had a great impact, has become the focus of the TV. I set production technology center in order to follow the new technology, expand production capacity, also introduced this year nonlinear post-production systems using multimedia technology. How the multimedia production system works System composition: Existing multimedia post-production systems are based on high-end PC or MAC as a platform, with the pentium PRO, PowerPC high-energy CPU, video card, bit rate compression card, digital stunt card, sound card, and high-speed data drives, controlled by the dedicated video editing software for television production tasks. First of all, were going to talk about the video rate compression. The TV signal is a very informative activity, and the amount of data that can be digitized is also very large. According to the unified standard of digital television signal in YUV4:2-2 format each pixel to four bytes, average 2 bytes per pixel, so a picture without the image compression of PAL (720 * 576 * 2) 810 k bytes, namely data rate is 19.78 MB per second, even if it is 1 gb hard drive can only save images of 52 seconds. Therefore, the storage and transmission of the digital video signal must be compressed. The present multimedia post-production systems mostly adopt Motion JPEG compression algorithm, in the case of a loss compression, this algorithm has a relatively stable and can set up video compression ratio. As you can see from the table, to achieve the above image quali