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    • 1. 发明授权
    • Combined audio coding minimizing perceptual distortion
    • 组合音频编码最小化感知失真
    • US07788090B2
    • 2010-08-31
    • US11575149
    • 2005-09-02
    • Steven Leonardus Josephus Dimphina Elisabeth Van De ParNicolle Hanneke Van SchijndelValery Stephanovich KotRichard Heusdens
    • Steven Leonardus Josephus Dimphina Elisabeth Van De ParNicolle Hanneke Van SchijndelValery Stephanovich KotRichard Heusdens
    • G10L19/00G10L19/02
    • G10L19/002G10L19/22
    • An audio encoder in which two or more preferably different encoders cooperate to generate a joint encoded audio signal. Encoding parameters of the two or more encoders are optimized in response to a measure of distortion of the joint encoded audio signal in accordance with a predetermined criterion. The distortion. measure is preferably a perceptual distortion measure. In one encoder embodiment comprising a sinusoidal and a waveform encoder, a constant total bit rate for each audio frame is distributed between the two encoders so as to minimize perceptual distortion for both the first and the second encoder. Other embodiments consider a set of encoding parameters that is larger than only those that minimize the perceptual distortion of the first encoder. In some embodiments, perceptual distortion may be minimized by optimizing encoding via optimizing entire encoding templates, i.e. a complex set of encoding parameters, for the separate encoders. The separate encoders may either be cascaded or operate in parallel, or in a combination of these. Two or more audio segments are preferably taken into account in the optimizing procedure. A corresponding audio decoder comprises separate decoders corresponding to the separate encoders of the audio encoder that encoded the audio signal. Decoded signal parts from these decoders are then added to produce the final audio signal. The presented audio encoding is efficient and provides a high sound quality because the encoding scheme is flexible and adapts to specific demands for each audio excerpt.
    • 一种音频编码器,其中两个或更多个优选地不同的编码器协作以产生联合编码的音频信号。 响应于根据预定标准对联合编码音频信号的失真的测量,优化两个或更多个编码器的编码参数。 失真。 度量优选是感知失真度量。 在包括正弦曲线和波形编码器的一个编码器实施例中,每个音频帧的恒定总比特率分布在两个编码器之间,以便最小化第一和第二编码器的感知失真。 其他实施例考虑一组编码参数,其大于仅使最小化第一编码器的感知失真的编码参数。 在一些实施例中,可以通过优化编码,通过优化整个编码模板(即编码参数的复杂集合)来分离编码器来最小化感知失真。 单独的编码器可以级联或并联操作,也可以组合使用。 在优化过程中优选考虑两个或多个音频段。 对应的音频解码器包括对应于编码音频信号的音频编码器的分离编码器的单独的解码器。 然后添加来自这些解码器的解码信号部分以产生最终音频信号。 所呈现的音频编码是有效的并且提供高音质,因为编码方案是灵活的并且适应于每个音频片段的特定需求。
    • 2. 发明授权
    • Scalable audio coding
    • 可扩展音频编码
    • US07921007B2
    • 2011-04-05
    • US11573570
    • 2005-07-25
    • Steven Leonardus Josephus Dimphina Elisabeth Van de ParValery Stephanovich KotNicolle Hanneke Van Schijndel
    • Steven Leonardus Josephus Dimphina Elisabeth Van de ParValery Stephanovich KotNicolle Hanneke Van Schijndel
    • G10L19/00G10L21/00G10L19/12G10L21/02G10L19/02
    • G10L19/028G10L19/03G10L19/24G10L21/038
    • The invention relates to an audio encoder and decoder and methods for audio encoding and decoding. In a preferred encoder embodiment an audio signal is encoded by deterministic encoder means to form a first encoded signal part. A spectrum of the audio signal is determined and represented by an excitation pattern, i.e. spectral values corresponding to human auditory filters, as a second encoded signal part. A masking curve is also extracted based on the excitation pattern, thus improving encoding efficiency in terms of bit rate. In a preferred decoder the first encoded signal part is decoded by deterministic decoder means. A noise generator uses the decoded first signal part together with the second signal part, i.e. the excitation pattern for the original audio signal, to generate a noise signal. The noise signal is then added to the first decoded signal part to form an output audio signal. At the decoder side the masking curve is also extracted based on the second encoded signal part, i.e. the excitation pattern. The noise signal is generated so that the output audio signal exhibits an excitation pattern nearly identical to the original audio signal. Thus, a perceived high quality audio is obtained while the encoded signal is scalable since a possible deviation between encoding and decoding of the first signal part is compensated by the noise generator at the decoder side. In preferred embodiments the coding means comprises a sinusoidal coder.
    • 本发明涉及音频编码器和解码器以及用于音频编码和解码的方法。 在优选的编码器实施例中,音频信号由确定性编码器装置编码以形成第一编码信号部分。 作为第二编码信号部分,由激励模式(即对应于人类听觉滤波器的频谱值)确定和表示音频信号的频谱。 还基于激励模式提取掩蔽曲线,从而提高了比特率方面的编码效率。 在优选的解码器中,第一编码信号部分由确定性解码器装置解码。 噪声发生器使用解码的第一信号部分与第二信号部分,即原始音频信号的激励模式一起产生噪声信号。 然后将噪声信号添加到第一解码信号部分以形成输出音频信号。 在解码器侧,也基于第二编码信号部分即激励图案提取掩蔽曲线。 产生噪声信号,使得输出音频信号呈现与原始音频信号几乎相同的激励图案。 因此,在编码信号是可缩放的情况下获得感知的高质量音频,因为第一信号部分的编码和解码之间的可能偏差由解码器侧的噪声发生器补偿。 在优选实施例中,编码装置包括正弦编码器。
    • 5. 发明授权
    • Method of audio encoding
    • 音频编码方法
    • US08065139B2
    • 2011-11-22
    • US11570508
    • 2005-06-14
    • Valery Stephanovich Kot
    • Valery Stephanovich Kot
    • G10L19/14
    • G10L19/18G10L19/022
    • There is described a method of encoding an input signal (20) to generate a corresponding encoded output signal (30), and also encoders (10) arranged to implement the method. The method comprises steps of: (a) distributing the input signal to sub-encoders (300, 310, 320) of the encoder (10); (b) processing the distributed input signal (20) at the sub-encoders (300, 310, 320) to generate corresponding representative parameter outputs (200, 210, 220) from the sub-encoders (300, 310, 320); and (c) combining the parameter outputs (200, 210, 220) of the sub-encoders (300, 310, 320) to generate the encoded output signal (30). Processing of the input signal (20) in the sub-encoders (300, 310, 320) involves segmenting the input signal (20) for analysis, such segments having associated temporal durations which are dynamically variable at least partially in response to information content present in the input signal (20). Such varying segment duration is capable of improving perceptual encoding quality and enhancing data compression achievable.
    • 描述了一种对输入信号(20)进行编码以产生对应的编码输出信号(30)的方法,以及编码器(10),用于实现该方法。 该方法包括以下步骤:(a)将输入信号分配给编码器(10)的子编码器(300,310,320); (b)在子编码器(300,310,320)处理分布式输入信号(20)以从子编码器(300,310,320)产生相应的代表参数输出(200,210,220); 和(c)组合子编码器(300,310,320)的参数输出(200,210,220)以产生编码的输出信号(30)。 子编码器(300,310,320)中的输入信号(20)的处理涉及分割用于分析的输入信号(20),这样的片段具有相关联的时间持续时间,其至少部分地响应于存在的信息内容动态变化 在输入信号(20)内。 这种变化的段持续时间能够改善感知编码质量并增强可实现的数据压缩。