| 摘要 |
<p>A signal component coding circuit codes a spectrum component from a converting circuit for converting an audio signal to a spectrum component. A code string generating circuit generates a code string block at every unit time from coded data from the signal component coding circuit. A compressibility changing circuit changes the compressibility of a code string from the code string generating circuit, as required. For example, when the compressibility needs to be further changed because of a change of the transmission capacity of a transmission channel, the compressibility changing circuit extracts, as required, the code of each signal component from the code string and generates a code string having a changed compressibility. This constitution solves the problem that when a code string having a changed compressibility is generated from a code string outputted from a coding device, conventional coding/decoding methods are not suitable for processings requiring high-speed operation, for example, a real-time compressibility change processing.</p> |
