Audio-encoding method and apparatus, audio-decoding method and apparatus, recoding medium thereof, and multimedia device employing same
    12.
    发明授权
    Audio-encoding method and apparatus, audio-decoding method and apparatus, recoding medium thereof, and multimedia device employing same 有权
    音频编码方法和装置,音频解码方法和装置,其编码介质以及使用它的多媒体装置

    公开(公告)号:US09361895B2

    公开(公告)日:2016-06-07

    申请号:US14123359

    申请日:2012-06-01

    摘要: Provided is an audio encoding method. The audio encoding method includes: acquiring envelopes based on a predetermined sub-band for an audio spectrum; quantizing the envelopes based on the predetermined sub-band; and obtaining a difference value between quantized envelopes for adjacent sub-bands and lossless encoding a difference value of a current sub-band by using a difference value of a previous sub-band as a context. Accordingly, the number of bits required to encode envelope information of an audio spectrum may be reduced in a limited bit range, thereby increasing the number of bits required to encode an actual spectral component.

    摘要翻译: 提供了一种音频编码方法。 音频编码方法包括:基于用于音频频谱的预定子带获取信封; 基于预定的子带量化信封; 并且通过使用前一子带的差值作为上下文,获得相邻子带的量化包络之间的差值,并对当前子带的差值进行无损编码。 因此,编码音频频谱的包络信息所需的比特数可以在有限的比特范围内减少,由此增加编码实际频谱分量所需的比特数。

    Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal
    13.
    发明授权
    Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal 失效
    用于量化和去量化输入信号的方法和装置,以及对输入信号进行编码和解码的方法和装置

    公开(公告)号:US07508333B2

    公开(公告)日:2009-03-24

    申请号:US11581331

    申请日:2006-10-17

    IPC分类号: H03M7/26

    CPC分类号: H04N19/126 G10L19/035

    摘要: A method and apparatus to quantize and dequantize an input signal, and a method and apparatus to encode and decode an input signal. The method of quantizing an input signal includes determining a quantization scale type according to a distribution feature of the input signal, and quantizing the input signal according to the determined quantization scale type. Accordingly, when a number of assigned bits is small in an encoding process, signal distortion can be minimized without an increase in complexity or having to use large sized additional information in order to determine an optimum scale. In addition, the input signal can be encoded by considering a trade-off of a distortion rate corresponding to the number of assigned bits of the input signal.

    摘要翻译: 用于量化和去量化输入信号的方法和装置,以及对输入信号进行编码和解码的方法和装置。 量化输入信号的方法包括根据输入信号的分布特征确定量化尺度类型,并根据确定的量化比例类型量化输入信号。 因此,当编码处理中的多个分配比特小时,可以最小化信号失真,而不增加复杂度,或者必须使用大尺寸附加信息以便确定最佳比例。 此外,可以通过考虑与输入信号的分配位数相对应的失真率的权衡来编码输入信号。

    Low-bitrate encoding/decoding method and system
    14.
    发明申请
    Low-bitrate encoding/decoding method and system 审中-公开
    低比特率编码/解码方法和系统

    公开(公告)号:US20060004566A1

    公开(公告)日:2006-01-05

    申请号:US11165569

    申请日:2005-06-24

    IPC分类号: G10L21/00

    摘要: A low-bitrate encoding system includes: a time-frequency transform unit transforming an input time-domain audio signal into a frequency-domain audio signal; a frequency component processor unit decimating frequency components in the frequency-domain audio signal; a psychoacoustic model unit modeling the received time-domain audio signal on the basis of human auditory characteristics, and calculating encoding bit allocation information; a quantizer unit quantizing the frequency-domain audio signal input from the frequency component processor unit to have a bitrate based on the encoding bit allocation information input from the psychoacoustic model unit; and a lossless encoder unit encoding the quantized audio signal losslessly, and outputting the encoded audio signal in a bitstream format. Using the low-bitrate encoding system, it is possible to effectively compress data at a low bitrate, and thus to provide a high quality audio signal.

    摘要翻译: 低比特率编码系统包括:时间 - 频率变换单元,将输入的时域音频信号变换为频域音频信号; 频率分量处理器单元抽取频域音频信号中的频率分量; 心理声学模型单元,基于人类听觉特征对所接收的时域音频信号进行建模,以及计算编码比特分配信息; 量化器单元,根据从心理声学模型单元输入的编码比特分配信息量化从频率分量处理器单元输入的频域音频信号以具有比特率; 以及无损地编码量化音频信号的无损编码器单元,并以比特流格式输出编码音频信号。 使用低比特率编码系统,可以以低比特率有效地压缩数据,从而提供高质量的音频信号。

    Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal
    15.
    发明申请
    Method and apparatus to quantize and dequantize input signal, and method and apparatus to encode and decode input signal 失效
    用于量化和去量化输入信号的方法和装置,以及对输入信号进行编码和解码的方法和装置

    公开(公告)号:US20070229345A1

    公开(公告)日:2007-10-04

    申请号:US11581331

    申请日:2006-10-17

    IPC分类号: H03M3/00 H04N7/26

    CPC分类号: H04N19/126 G10L19/035

    摘要: A method and apparatus to quantize and dequantize an input signal, and a method and apparatus to encode and decode an input signal. The method of quantizing an input signal includes determining a quantization scale type according to a distribution feature of the input signal, and quantizing the input signal according to the determined quantization scale type. Accordingly, when a number of assigned bits is small in an encoding process, signal distortion can be minimized without an increase in complexity or having to use large sized additional information in order to determine an optimum scale. In addition, the input signal can be encoded by considering a trade-off of a distortion rate corresponding to the number of assigned bits of the input signal.

    摘要翻译: 用于量化和去量化输入信号的方法和装置,以及对输入信号进行编码和解码的方法和装置。 量化输入信号的方法包括根据输入信号的分布特征确定量化尺度类型,并根据确定的量化比例类型量化输入信号。 因此,当编码处理中的多个分配比特小时,可以最小化信号失真,而不增加复杂度,或者必须使用大尺寸附加信息以便确定最佳比例。 此外,可以通过考虑与输入信号的分配位数相对应的失真率的权衡来编码输入信号。