AUDIO ENCODER AND AUDIO DECODER FOR ENCODING AND DECODING AUDIO SIGNAL READINGS Russian patent published in 2014 - IPC G10L19/02 G10L19/24 

FIELD: physics, acoustics.

SUBSTANCE: audio encoder (100) for encoding audio signal readings includes a first encoder with time superposition (aliasing) (110) for encoding audio readings in a first encoding region according to a first windowing rule, with attachment of a start window and a stop window. The audio encoder (100) further includes a second encoder (120) for encoding readings in a second encoding region, which processes a frame format-set number of audio readings and comprising a series of audio readings of an encoding mode stabilisation interval, which applies a different, second encoding rule, wherein the frame of the second encoder (120) is an encoded representation of time-consecutive audio signals, the number of which is set by the frame format. The audio encoder (100) also includes a controller (130) which performs switching from the first encoder (110) to the second encoder (120) according to the characteristics of the audio readings and corrects the second windowing rule when switching from the first encoder (110) to the second encoder (120) or modifies the start window or stop window of the first encoder (110) while keeping the second windowing rule unchanged.

EFFECT: improved switching between multiple working regions when encoding sound in both the time and frequency domains.

34 cl, 28 dwg