Bitrate constrained variable bitrate audio encoding
    1.
    发明授权
    Bitrate constrained variable bitrate audio encoding 有权
    比特率约束可变比特率音频编码

    公开(公告)号:US07895045B2

    公开(公告)日:2011-02-22

    申请号:US12610615

    申请日:2009-11-02

    IPC分类号: G10L19/00 G10L19/02

    CPC分类号: G10L19/035

    摘要: A hybrid audio encoding technique incorporates both ABR, or CBR, and VBR encoding modes. For each audio coding block, after a VBR quantization loop meets the NMR target, a second quantization loop might be called to adaptively control the final bitrate. That is, if the NMR-based quantization loop results in a bitrate that is not within a specified range, then a bitrate-based CBR or ABR quantization loop determines a final bitrate that is within the range and is adaptively determined based on the encoding difficulty of the audio data. Excessive bitrates from use of conventional VBR mode are eliminated, while still providing much more constant perceptual sound quality than use of conventional CBR mode can achieve.

    摘要翻译: 混合音频编码技术包括ABR或CBR和VBR编码模式。 对于每个音频编码块,在VBR量化循环满足NMR目标之后,可以调用第二量化循环来自适应地控制最终比特率。 也就是说,如果基于NMR的量化循环导致不在特定范围内的比特率,则基于比特率的CBR或ABR量化循环确定在该范围内的最终比特率,并且基于编码难度自适应地确定 的音频数据。 消除了使用常规VBR模式的过多比特率,同时仍然提供比使用常规CBR模式可以实现更多的恒定的感知音质。

    Bitrate constrained variable bitrate audio encoding
    2.
    发明授权
    Bitrate constrained variable bitrate audio encoding 有权
    比特率约束可变比特率音频编码

    公开(公告)号:US07634413B1

    公开(公告)日:2009-12-15

    申请号:US11067080

    申请日:2005-02-25

    IPC分类号: G10L19/00 G10L19/02

    CPC分类号: G10L19/035

    摘要: A hybrid audio encoding technique incorporates both ABR, or CBR, and VBR encoding modes. For each audio coding block, after a VBR quantization loop meets the NMR target, a second quantization loop might be called to adaptively control the final bitrate. That is, if the NMR-based quantization loop results in a bitrate that is not within a specified range, then a bitrate-based CBR or ABR quantization loop determines a final bitrate that is within the range and is adaptively determined based on the encoding difficulty of the audio data. Excessive bitrates from use of conventional VBR mode are eliminated, while still providing much more constant perceptual sound quality than use of conventional CBR mode can achieve.

    摘要翻译: 混合音频编码技术包括ABR或CBR和VBR编码模式。 对于每个音频编码块,在VBR量化循环满足NMR目标之后,可以调用第二量化循环来自适应地控制最终比特率。 也就是说,如果基于NMR的量化循环导致不在特定范围内的比特率,则基于比特率的CBR或ABR量化循环确定在该范围内的最终比特率,并且基于编码难度自适应地确定 的音频数据。 消除了使用常规VBR模式的过多比特率,同时仍然提供比使用常规CBR模式可以实现更多的恒定的感知音质。