发明名称 |
ROM addressing method for an ADPCM decoder implementation |
摘要 |
A micro-controller is connected between a hardware-based adaptive differential pulse code modulation (ADPCM) decoder and a read only memory (ROM) storing both micro-controller programming instructions and ADPCM encoded source file data. A micro-controller architecture implements time multiplexed ROM addressing driven by a two phase clock signal. In an instruction phase, a program counter supplies ROM address(es) for retrieving micro-controller programming instructions. In a decoder phase, an address counter supplies ROM address (es) for retrieving portions of the ADPCM encoded source file data. ADPCM encoded source file data extracted from the ROM in the decoder phase of the clock signal is delivered to the decoder for processing during the subsequent instruction phase of the clock signal. The selection between program counter and address counter supplied addresses for application to the ROM is made by a two phase clock signal driven multiplexer.
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申请公布号 |
US7191301(B2) |
申请公布日期 |
2007.03.13 |
申请号 |
US20010033204 |
申请日期 |
2001.12.26 |
申请人 |
SHENZHEN STS MICROELECTRONICS, CO. LTD. |
发明人 |
TIAN LIJUN |
分类号 |
G06F12/00;H04B7/26;H04B14/04 |
主分类号 |
G06F12/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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