| 摘要 |
PURPOSE:To realize the recording of sounds with a reduced amount of memory capacity, by digitizing an aural signal with the digital modulation to carry out the band compression and at the same time compressing further the information quantity during a pause period of the voice. CONSTITUTION:An analog aural signal Ain receives the digital modulation through a sound record control circuit 1. The 8-bit data D0-D1 are set as a frame to be applied to a memory 2. The address count pulses AD are counted by a counter provided in an address circuit 3. According to the contents of this counting, address signals A1-Am are applied to the memory 2. Then the writing is carried out with every frame in the timing of a write pulse W. |
