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    ADAPTIVE TRANSFER FUNCTION FOR VIDEO ENCODING AND DECODING
    12.
    发明申请
    ADAPTIVE TRANSFER FUNCTION FOR VIDEO ENCODING AND DECODING 审中-公开
    用于视频编码和解码的自适应传输函数

    公开(公告)号：US20150245050A1

    公开(公告)日：2015-08-27

    申请号：US14631410

    申请日：2015-02-25

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  David Singer

    IPC: H04N19/52 ,  H04N19/182 ,  H04N19/14 ,  H04N19/176

    Abstract: A video encoding and decoding system that implements an adaptive transfer function method internally within the codec for signal representation. A focus dynamic range representing an effective dynamic range of the human visual system may be dynamically determined for each scene, sequence, frame, or region of input video. The video data may be cropped and quantized into the bit depth of the codec according to a transfer function for encoding within the codec. The transfer function may be the same as the transfer function of the input video data or may be a transfer function internal to the codec. The encoded video data may be decoded and expanded into the dynamic range of display(s). The adaptive transfer function method enables the codec to use fewer bits for the internal representation of the signal while still representing the entire dynamic range of the signal in output.

    Abstract translation: 视频编码和解码系统，在内部用于信号表示的编解码器中实现自适应传递函数方法。 可以为输入视频的每个场景，序列，帧或区域动态地确定表示人类视觉系统的有效动态范围的聚焦动态范围。 视频数据可以根据用于编解码器内的编码的传递函数进行裁剪和量化为编解码器的比特深度。 传递函数可以与输入视频数据的传递函数相同，也可以是编解码器内部的传递函数。 编码的视频数据可以被解码并扩展到显示器的动态范围。 自适应传递函数方法使得编解码器能够使用较少的位用于信号的内部表示，同时仍然表示输出中的信号的整个动态范围。

    Multidimensional quantization techniques for video coding/decoding systems
    14.
    发明授权
    Multidimensional quantization techniques for video coding/decoding systems 有权

    公开(公告)号：US11539974B2

    公开(公告)日：2022-12-27

    申请号：US17493607

    申请日：2021-10-04

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

    IPC: H04N19/50 ,  H04N19/184 ,  H04N19/167 ,  H04N19/436 ,  H04N19/186 ,  H04N19/132 ,  H04N19/124 ,  H04N19/13 ,  H04N19/15 ,  H04N19/30 ,  H04N19/42 ,  H04N19/48 ,  H04N19/182

    Abstract: Video compression and decompression techniques are disclosed that provide improved bandwidth control for video compression and decompression systems. In particular, video coding and decoding techniques quantize input video in multiple dimensions. According to these techniques, pixel residuals may be generated from a comparison of an array of input data to an array of prediction data. The pixel residuals may be quantized in a first dimension. After the quantization, the quantized pixel residuals may be transformed to an array of transform coefficients. The transform coefficients may be quantized in a second dimension and entropy coded. Decoding techniques invert these processes. In still other embodiments, multiple quantizers may be provided upstream of the transform stage, either in parallel or in cascade, which provide greater flexibility to video coders to quantize data in different dimensions in an effort to balance the competing interest in compression efficiency and quality of reconstructed video.

    VIDEO ENCODING OPTIMIZATION WITH EXTENDED SPACES
    17.
    发明申请
    VIDEO ENCODING OPTIMIZATION WITH EXTENDED SPACES 有权
    视频编码优化与扩展空间

    公开(公告)号：US20150249833A1

    公开(公告)日：2015-09-03

    申请号：US14503200

    申请日：2014-09-30

    Applicant: Apple Inc.

    Inventor： Alexandros Tourapis ,  David Singer ,  Guy Cote ,  Timothy J. Millet

    IPC: H04N19/154 ,  H04N19/124 ,  H04N19/40 ,  H04N19/176 ,  H04N19/103 ,  H04N19/196

    CPC classification number: H04N19/154 ,  H04N19/103 ,  H04N19/124 ,  H04N19/176 ,  H04N19/196 ,  H04N19/40

    Abstract: Embodiments of the present invention may provide a video coder. The video coder may include an encoder to perform coding operations on a video signal in a first format to generate coded video data, and a decoder to decode the coded video data. The video coder may also include an inverse format converter to convert the decoded video data to second format that is different than the first format and an estimator to generate a distortion metric using the decoded video data in the second format and the video signal in the second format. The encoder may adjust the coding operations based on the distortion metric.

    Abstract translation: 本发明的实施例可以提供视频编码器。 视频编码器可以包括编码器，以对第一格式的视频信号执行编码操作，以产生编码的视频数据，以及解码器，对编码的视频数据进行解码。 视频编码器还可以包括逆格式转换器，用于将解码的视频数据转换为与第一格式不同的第二格式，以及估计器，以使用第二格式的解码视频数据和第二格式的视频信号来生成失真度量 格式。 编码器可以基于失真度量来调整编码操作。

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