首页>
外国专利>
DIGITAL SIGNAL PROCESSING SCHEME FOR HIGH PERFORMANCE HFC DIGITAL RETURN PATH SYSTEM WITH BANDWIDTH CONSERVATION
DIGITAL SIGNAL PROCESSING SCHEME FOR HIGH PERFORMANCE HFC DIGITAL RETURN PATH SYSTEM WITH BANDWIDTH CONSERVATION
展开▼
机译:具有带宽保护的高性能HFC数字返回路径系统的数字信号处理方案
展开▼
页面导航
摘要
著录项
相似文献
摘要
In a cable return path system, a method for performing digital companding adds a predetermined offset to the digital value to be companded, and employs a modified µ-law or a-law companding technique to obtain a reduced bit length digital value. One embodiment of this modified approach adds a predetermined offset (e.g., 129 for a 12-bit implementation) to the digital value before companding and then employs a two-bit chord and a 5-bit step for the 12-bit implementation. The end result is that the performance metrics are not significantly compromised by this bit reduction when compared to current transmission methods without this technique.
展开▼