发明授权
US4224642A PCM Recording and reproducing method providing for dropout compensation
失效
PCM提供退出补偿的记录和再现方法
- 专利标题: PCM Recording and reproducing method providing for dropout compensation
- 专利标题(中): PCM提供退出补偿的记录和再现方法
-
申请号: US904892申请日: 1978-05-11
-
公开(公告)号: US4224642A公开(公告)日: 1980-09-23
- 发明人: Akinori Mawatari , Hirohisa Yamaguchi , Kenji Nakamura , Satoshi Uchiumi
- 申请人: Akinori Mawatari , Hirohisa Yamaguchi , Kenji Nakamura , Satoshi Uchiumi
- 申请人地址: JPX Tokyo
- 专利权人: TEAC Corporation
- 当前专利权人: TEAC Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX52/57488 19770518
- 主分类号: H04L1/00
- IPC分类号: H04L1/00 ; G11B7/0045 ; G11B20/10 ; G11B20/12 ; G11B20/18 ; G11B5/00 ; G11B5/09 ; G11B15/02
摘要:
For recording and reproducing analog audio signals by a pulse-code modulation scheme so as to permit effective compensation for dropout errors, an incoming audio signal is sampled, and the analog samples are converted into a sequence of coded pulse groups or words. These words are grouped into successive notional blocks, and the odd and the even words, for example, of each block are divided into sub-blocks, as by sequentially writing the words of each block in successive storage locations in a memory and by retrieving the odd, and then the even, words from the memory. The sub-blocks of the successive word blocks are recorded in different regions on a recording medium such as magnetic tape. After being reconverted into an electrical signal from the recording medium, the words of the sub-blocks of each block are rearranged into the original order, as by use of a second memory, prior to the reconstruction of the analog audio signal.
公开/授权文献
- US5301248A Method for pattern inspection and apparatus therefor 公开/授权日:1994-04-05