Signal coding and decoding methods and devices

摘要

In a signal coding method, bits for coding allocated to different bands of a frequency domain signal obtained from an input signal are adjusted to improve the coding quality. The total available bits for coding are first allocated to the bands of the frequency domain signal according to a predetermined allocation rule. The numbers of bits allocated to the respective bands of the frequency domain signal are then adjusted when a highest frequency of the frequency domain signal to which bits are allocated is greater than a predetermined value. The frequency domain signal is coded according to the adjusted bit allocation for the bands of the frequency domain signal.

主权项

1. A signal coding method performed by a network device comprising a processor to code an input audio signal, wherein the method comprises:
obtaining a frequency domain signal of a current frame of the input audio signal, wherein the frequency domain signal has multiple bands; allocating available bits for coding the frequency domain signal to the bands of the frequency domain signal, wherein each band either has bits or has no bit allocated thereto; adjusting numbers of bits allocated to respective bands of the frequency domain signal when a highest index of a band with bits allocated thereto is greater than a threshold; and coding the frequency domain signal by using the adjusted bits allocation.