In which ADPCM is responsible for the audio signal's encoding/decoding and processing, and the latter is responsible for IP packing and unpacking.
In which ADPCM is responsible for the audio signal's encoding/decoding and processing, and the latter is responsible for IP packing and unpacking.
前者用于语音的编／解码和信令提取，信令不单独占用带宽；后者负责码流的IP封装和解封装。