论文部分内容阅读
日本松下电器公司试制成能录放12小时的数字记录式1/2英寸磁带录像机。它用4f_∞(副载频)(约14.3MHz)取样NTSC信号,以32Mb/s的高效率编码由8b A/D变换后的115Mb/s的数据,把它作8-10进制变换后,分成2路(各自20Mb/s)记录,由场间奈奎斯特取样、阿达玛变换、向量量化进行高效率编码。该机还附有错误校正用的标准所罗门码、水平/垂直同格、周期性冗余检验码等(插入消隐间)。由金属
Japan’s Matsushita Electric company trial production can be put 12 hours of digital recording type 1/2-inch tape recorders. It samples the NTSC signal with 4f_∞ (subcarrier) (about 14.3MHz), encodes 115Mb / s converted from 8b A / D data with high efficiency of 32Mb / s, converts it to 8-10 hexadecimal , Divided into 2 (each 20Mb / s) records, by the Nyquist sampling field, Hadamard transform, vector quantization of high-efficiency coding. The machine also comes with a standard error correction Solomon code, the same horizontal / vertical, periodic redundancy check code (insert blanking). Made of metal