| 摘要 |
An ExOR circuit performs volume comparison between a sound level expressed by audio data and zero level by detecting whether or not the sign of audio data at a given time stored in a first register is inverted from a sign of audio data which is one sample before the audio data at the given time stored in a second register. A shift register for shifting audio data outputted from the first register changes the sound level by changing the shift amount every time the ExOR circuit detects the sign inversion.
|
