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公开(公告)号：WO1982000394A1
公开(公告)日：1982-02-04
申请号：PCT/US1981000958
申请日：1981-07-15
Applicant: RCA CORP
IPC: H04N05/06
CPC classification number: H04N5/067
Abstract: A television sync signal generator adapted for ready conversion among various television standards includes a memory (216) in which information related to the magnitude of at least one component of a composite sync signal is stored at address locations each corresponding to at least one particular time in each recurrent television frame. A clock signal generator (212) addresses the memory (216) to sequentially read out the information so the sync signal can be reconstructed. By dividing the sync signal into four intervals which are selected by paging signals from one counter, a reduction in required memory capacity is achieved. For further reducing the number of memory addresses required, each memory address contains information relating to the instantaneous resolution or clock rate. A sample rate controller (820) is coupled to the memory for having the instantaneous clock address rate controlled in response to the contents of the memory.
Abstract translation: 适于在各种电视标准之间进行即时转换的电视同步信号发生器包括存储器（216），其中与复合同步信号的至少一个分量的大小相关的信息被存储在地址位置，每个地址位置对应于至少一个特定时间 每个经常性的电视架构。 时钟信号发生器（212）寻址存储器（216）以顺序读出信息，从而可以重构同步信号。 通过将同步信号划分成由来自一个计数器的寻呼信号选择的四个间隔，实现了所需存储器容量的减少。 为了进一步减少所需的存储器地址数量，每个存储器地址包含与瞬时分辨率或时钟速率有关的信息。 采样率控制器（820）耦合到存储器，用于响应于存储器的内容来控制瞬时时钟地址速率。
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