Systems and methods for audio encoding and decoding
Systems and methods are provided for audio encoding. For example, first quantization encoding is performed on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data; second quantization encoding is performed on the audio data to obtain second quantization-encoded data; the first quantization-encoded data is coupled to the current frame of the audio data stream; and the second quantization-encoded data is coupled to a next frame of the audio data stream.
1. A method for audio encoding, comprising:
performing first quantization encoding on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data;
performing second quantization encoding on the audio data to obtain second quantization-encoded data;
coupling the first quantization-encoded data to the current frame of the audio data stream;
coupling the second quantization-encoded data to a next frame of the audio data stream; and
initiating transmission of the first quantization-encoded data and the second quantization-encoded data to a decoding terminal, the decoding terminal being configured to obtain the current frame of the audio data stream by decoding the second quantization-encoded data in the next frame to avoid retransmission of the current frame when there is packet loss during the transmission.
2. The method of claim 1 , further comprising:
performing first spectral-band-replication encoding on the audio data to obtain first spectral-band-replication encoded data;
performing second spectral-band-replication encoding on the audio data to obtain second spectral-band-replication encoded data;
coupling the first spectral-band-replication encoded data to the current frame of the audio data stream; and
coupling the second spectral-band-replication encoded data to the next frame of the audio data stream.
3. A method for audio decoding, comprising:
obtaining an audio data stream, a current frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the current frame and second quantization-encoded data corresponding to audio data associated with a frame immediately preceding the current frame, a next frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the next frame and second quantization-encoded data corresponding to the audio data associated with the current frame;
determining whether the current frame of the audio data stream is lost;
in response to the current frame of the audio data stream not being lost,
obtaining the first quantization-encoded data from the current frame of the audio data stream; and
decoding the first quantization-encoded data to obtain the audio data associated with the current frame;
in response to the current frame of the audio data stream being lost,
obtaining the second quantization-encoded data from the next frame of the audio data stream; and
decoding the second quantization-encoded data to obtain the audio data associated with the current frame.
4. The method of claim 3 , further comprising:
in response to the current frame of the audio data stream not being lost,
obtaining first spectral-band-replication encoded data from the current frame of the audio data stream, the first spectral-band-replication encoded data being included in the current frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the first spectral-band-replication encoded data;
in response to the current frame of the audio data stream being lost,
obtaining second spectral-band-replication encoded data from the next frame of the audio data stream, the second spectral-band-replication encoded data being included in the next frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the second spectral-band-replication encoded data.
5. A system for audio encoding, comprising:
at least one data processor; and
memory storing instructions which, when executed by the at least one data processor, result in operations comprising:
performing first quantization encoding on audio data associated with a current frame of an audio data stream to obtain first quantization-encoded data;
performing second quantization encoding on the audio data to obtain second quantization-encoded data;
coupling the first quantization-encoded data to the current frame of the audio data stream;
coupling the second quantization-encoded data to a next frame of the audio data stream; and
initiating transmission of the first quantization-encoded data and the second quantization-encoded data to a decoding terminal, the decoding terminal being configured to obtain the current frame of the audio data stream by decoding the second quantization-encoded data in the next frame to avoid retransmission of the current frame when there is packet loss during the transmission.
6. The system of claim 5 , wherein the operations further comprise:
performing first spectral-band-replication encoding on the audio data to obtain first spectral-band-replication encoded data;
performing second spectral-band-replication encoding on the audio data to obtain second spectral-band-replication encoded data;
coupling the first spectral-band-replication encoded data to the current frame of the audio data stream; and
coupling the second spectral-band-replication encoded data to the next frame of the audio data stream.
7. A system for audio decoding, comprising:
at least one data processor; and
memory storing instructions which, when executed by the at least one data processor, result in operations comprising:
obtaining an audio data stream, a current frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the current frame and second quantization-encoded data corresponding to audio data associated with a frame immediately preceding the current frame, a next frame of the audio data stream including first quantization-encoded data corresponding to audio data associated with the next frame and second quantization-encoded data corresponding to the audio data associated with the current frame;
determining whether the current frame of the audio data stream is lost;
in response to the current frame of the audio data stream not being lost,
obtaining the first quantization-encoded data from the current frame of the audio data stream; and
decoding the first quantization-encoded data to obtain the audio data associated with the current frame;
in response to the current frame of the audio data stream being lost,
obtaining the second quantization-encoded data from the next frame of the audio data stream; and
decoding the second quantization-encoded data to obtain the audio data associated with the current frame.
8. The system of claim 7 , wherein the operations further comprise:
in response to the current frame of the audio data stream not being lost,
obtaining first spectral-band-replication encoded data from the current frame of the audio data stream, the first spectral-band-replication encoded data being included in the current frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the first spectral-band-replication encoded data;
in response to the current frame of the audio data stream being lost,
obtaining second spectral-band-replication encoded data from the next frame of the audio data stream, the second spectral-band-replication encoded data being included in the next frame of the audio data stream and corresponding to the audio data associated with the current frame; and
performing band recovery on the audio data associated with the current frame based on at least information associated with the second spectral-band-replication encoded data.