Method and apparatus to encode and decode an audio/speech signal

• US 9,728,196 B2
• Filed: 05/09/2016
• Issued: 08/08/2017
• Est. Priority Date: 07/14/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Sung, Ho Sang, Kim, Mi Young, Kim, Jung Hoe, Choo, Ki-hyun, Oh, Eun Mi
• Primary Examiner(s): Chawan, Vijay B
• Application Number:
  US15/149,847
• Publication Number:
  US 20160254005A1
• Time in Patent Office: 456 Days
• Field of Search: 7042001, 704205, 704209, 704230, 704212, 704203, 704220, 704500-504, 704224
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
• CPC Class Codes: G10L 19/0204 using subband decomposition
• CPC Class Codes: G10L 19/0212 using orthogonal transformation
• CPC Class Codes: G10L 19/03 Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
• CPC Class Codes: G10L 19/04 using predictive techniques
• CPC Class Codes: G10L 19/12 the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
• CPC Class Codes: G10L 19/167 Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
• CPC Class Codes: G10L 19/20 using sound class specific coding, hybrid encoders or object based coding

Abstract

A method and apparatus to encode and decode an audio/speech signal is provided. An inputted audio signal or speech signal may be transformed into at least one of a high frequency resolution signal and a high temporal resolution signal. The signal may be encoded by determining an appropriate resolution, the encoded signal may be decoded, and thus the audio signal, the speech signal, and a mixed signal of the audio signal and the speech signal may be processed.

Claims

1. A method for decoding an audio or speech signal, the method comprising:

receiving a signal in a bitstream as an input;

determining whether the signal is encoded in a frequency domain or a Linear Prediction (LP) domain based on encoding information included in the bitstream;

loss-less decoding and dequantizing the signal when it is determined that the signal is encoded in the frequency domain;

performing a temporal noise shaping on the dequantized signal;

inverse-transforming the temporal noise shaped signal to a time domain signal;

reconstructing the signal by using a linear prediction based decoding when it is determined that the signal is encoded in the LP domain; and

generating a high band signal using either the inverse-transformed signal or the reconstructed signal; and

outputting the high band signal.

2. The method of claim 1 further comprising:

generating a stereo signal from the high band signal and either the inverse-transformed signal or the reconstructed signal.

3. The method of claim 1, wherein the reconstructing the signal comprising:

reconstructing the signal encoded in the LP domain by using at least a long-term predictor.