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Signal encoding method and apparatus using selected predetermined code tables - Patent 5835030 |
 | | Code train generation circuitry generates a code train that includes the encoded normalized spectrum data and information indicative of the at least one selected code table and of the normalization coefficients and number of quantization step information in accordance with which the encoding circuitry normalizes each frame of input spectrum data. |
 | | The code train generating circuit 19 multiplexes encoded data outputted from the quantized data encoding circuit 18, and normalization coefficient, the number of quantization bits, code table ID (identification) information and code table sub information, etc. which correspond to the encoded data to generate a code train in conformity with a predetermined format. |
 | | The code table selecting circuit 56 decodes the code table ID information to judge whether that information is a flag indicating a code table used in encoding of the entirety of one frame (i.e., "00", "01", "10"), or a flag indicating that code table sub information exists (i.e., "11"). |
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