Audio coding and decoding apparatuses and methods, and recording media storing the methods
AssigneeSamsung Electronics Co., Ltd.
InventorsHosang Sung, Rakesh Taori, Kangeun Lee
Life of this patent
Estimating the term…
Abstract
Audio coding and decoding apparatuses and methods which support fine granularity scalability (FGS) using harmonic information of a high-band audio signal or wideband error audio signal when performing wideband audio coding and decoding, and recording mediums on which the methods are stored. The audio coding method includes detecting harmonics of a high-band audio signal or wideband error audio signal of an input audio signal; determining an order of the detected harmonics; and coding the detected harmonics based on the determined order.
Claims26
An audio coding method comprising:
- detecting harmonics of a high-band audio signal or wideband error audio signal of an input audio signal;
- determining an order of the detected harmonics;
- and
- coding the detected harmonics based on the determined order of the detected harmonics.
An audio coding apparatus comprising:
- a harmonic detecting unit detecting harmonics of a high-band audio signal or wideband error audio signal of an input audio signal;
- a harmonic order determining unit determining an order of the detected harmonics;
- and
- a harmonic coding unit coding the harmonics based on the determined order of the detected harmonics.
An audio decoding method comprising:
- decoding a received bitstream corresponding to a coded high-band audio signal or wideband error audio signal for each layer of the received bitstream;
- and
- outputting a decoded result for each layer as a high-band audio signal or wideband error audio signal restored in each layer.
An audio decoding apparatus comprising:
- a bit unpacking unit, which, when a bitstream corresponding to a coded high-band audio signal or wideband error audio signal is received, unpacks and outputs the received bitstream;
- and
- a harmonic decoding unit which decodes the bitstream outputted in each layer from the bit packing unit in layer units.
A recording medium on which a program for performing an audio coding method is recorded, the audio coding method comprising:
- detecting harmonics of a high-band audio signal or wideband error audio signal of an input audio signal;
- determining an order of the detected harmonics;
- and
- coding the detected harmonics based on the determined order of the detected harmonics.
A recording medium on which a program for performing an audio decoding method is recorded, the audio decoding method comprising:
- decoding a received bitstream corresponding to a coded high-band audio signal or wideband error audio signal for each layer of the received bitstream;
- and
- outputting decoded result for each layer as a high-band audio signal or wideband error audio signal restored of each layer.
A wideband audio system, comprising:
- an audio coding section having a high-band or wideband error audio coding unit which outputs a bitstream, the audio coding section comprising
- a harmonic detecting unit detecting harmonics of a high-band audio signal or wideband error audio signal of an input audio signal,
- a harmonic order determining unit determining an order of the detected harmonics, and
- a harmonic coding unit coding the harmonics based on the determined order of the detected harmonics;
- and
- an audio decoding section having high-band or wideband error audio decoding unit comprising
- a bit unpacking unit, which unpacks and outputs the bitstream output from coded high-band or wideband error audio coding unit, and
- a harmonic decoding unit which decodes the bitstream outputted in each layer from the bit packing unit in layer units.
Dependencies are inferred from the claim text.