| 摘要 |
An analog signal (A(t)), for example in a sound recording process, is converted into an input series of digital signals (A1, A2, ....A17) and is then encoded using a special differential encoding scheme (Encoding CKT). The scheme involves generating two series of signals (A1, A3, A5, A7,...) and (B1, B2, B3, B4, ....), one series corresponding to some of the terms of the input signals, while other terms of the input series are excluded. For example the first series may include every second term of the input series. The second series includes terms corresponding to a difference between at least two terms of the input series, at least one of which is not included in the first series. Preferably the two terms of the input series defining a term of the second series are sequential or at most separated by one other term. The two series can be combined and can be either transmitted to a receiver or recorded on a medium. A high quality output (A1, A2, A3, ...An) is then obtained by reconstructing the input series from the two series. Alternatively, allow quality output is generated by using the first series and only some of the terms (if any) of the second series. |
