Apparatus and method for encoding and decoding signal for high frequency bandwidth extension

摘要

An apparatus and method for encoding and decoding a signal for high frequency bandwidth extension are provided. An encoding apparatus may down-sample a time domain input signal, may core-encode the down-sampled time domain input signal, may transform the core-encoded time domain input signal to a frequency domain input signal, and may perform bandwidth extension encoding using a basic signal of the frequency domain input signal.

主权项

1. An encoding apparatus comprising:
a signal generator to generate a base excitation spectrum for a high band, based on an input spectrum; an energy extractor to obtain an energy from the input spectrum; an energy controller to obtain an energy control factor based on a ratio between tonality of the input spectrum and tonality of the base excitation spectrum, and control the energy based on the obtained energy control factor; and an energy quantizer to quantize the controlled energy.