ENCODING DEVICE AND METHOD, DECODING DEVICE AND METHOD, AND PROGRAM

摘要

The present invention pertains to an encoding device and method, a decoding device and method, and to a program, with which sound of an appropriate volume level can be obtained with a smaller quantity of codes. A first gain calculation circuit calculates a first gain for volume level correction of an input time series signal, and a second gain calculation circuit calculates a second gain for volume level correction of a downmixed signal obtained by downmixing of the input time series signal. A gain encoding circuit computes the gain differential between the first gain and the second gain, the gain differential between time frames, and the gain differential within time frames, and encodes the first gain and the second gain. The present invention can be applied in encoding devices and decoding devices.

主权项

1. An encoding device, comprising:
a gain calculator that calculates a first gain value and a second gain value for volume level correction of each frame of a sound signal; and a gain encoder that obtains a first differential value between the first gain value and the second gain value, or obtains a second differential value between the first gain value and the first gain value of the adjacent frame or between the first differential value and the first differential value of the adjacent frame, and encodes information based on the first differential value or the second differential value.