公开(公告)号：US09060180B2

公开(公告)日：2015-06-16

申请号：US13478695

申请日：2012-05-23

申请人： Walter C. Gish ,  Samir Hulyalkar

发明人： Walter C. Gish ,  Samir Hulyalkar

IPC分类号： H04N19/61 ,  H04N19/30

CPC分类号： H04N19/61 ,  H04N19/30

摘要： A visual dynamic range (VDR) signal and a standard dynamic range (SDR) signal are received. A first (e.g., MPEG-2) encoder encodes a base layer (BL) signal. A second encoder encodes an enhancement layer (EL). The EL signal represents information with which the VDR signal may be reconstructed, e.g., using the BL and the EL signals. The first encoder encodes the SDR signal with inverse discrete cosine transform (IDCT) coefficients that have a fixed precision, e.g., which represent fixed-point approximations of transform coefficients that may have arbitrary precisions. The BL signal is encoded in a stream that conforms with an Advanced Television Standards Committee (ATSC) standard. The EL is encoded in a stream that conforms with an ATSC enhanced vestigial sideband (E-VSB) standard. The BL and EL signals are combined; e.g., multiplexed, and transmitted together.

摘要翻译： 接收视觉动态范围（VDR）信号和标准动态范围（SDR）信号。 第一（例如，MPEG-2）编码器编码基本层（BL）信号。 第二编码器对增强层（EL）进行编码。 EL信号表示可以重构VDR信号的信息，例如使用BL和EL信号。 第一编码器用具有固定精度的反离散余弦变换（IDCT）系数对SDR信号进行编码，例如，其表示可能具有任意精度的变换系数的定点近似。 BL信号以符合高级电视标准委员会（ATSC）标准的流编码。 EL以符合ATSC增强残留边带（E-VSB）标准的流编码。 BL和EL信号组合; 例如，多路复用，并一起发送。

公开(公告)号：US10298923B2

公开(公告)日：2019-05-21

申请号：US14116326

申请日：2012-05-11

申请人： Guan-Ming Su ,  Sheng Qu ,  Walter C. Gish ,  Zhen Li

发明人： Guan-Ming Su ,  Sheng Qu ,  Walter C. Gish ,  Zhen Li

IPC分类号： H04N19/105 ,  H04N19/30 ,  H04N19/186 ,  H04N19/187 ,  H04N19/85 ,  H04N19/98

摘要： In layered Visual Dynamic range (VDR) coding, inter-layer prediction requires several color-format transformations between the input VDR and Standard Dynamic Range (SDR) signals. Coding and decoding architectures are presented wherein inter-layer prediction is performed in the SDR-based color format, thus reducing computational complexity in both the encoder and the decoder, without compromising coding efficiency or coding quality.

公开(公告)号：US08259795B2

公开(公告)日：2012-09-04

申请号：US13216836

申请日：2011-08-24

申请人： Walter C. Gish ,  Christopher J. Vogt

发明人： Walter C. Gish ,  Christopher J. Vogt

IPC分类号： H04N7/12

CPC分类号： H04N19/124 ,  H04N19/126 ,  H04N19/184 ,  H04N19/61

摘要： The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).

摘要翻译： 量化参数QP在数字视频压缩中是众所周知的，作为图像质量的指示。 表示运动图像的数字符号用量化步骤进行量化，该量化步骤是量化参数QP的函数QSN，QSN已被归一化为数字符号的比特深度的最高有效位。 结果，给定QP的效果基本上与比特深度无关，特定的QP值对图像质量具有标准影响，而不考虑比特深度。 本发明例如在不同比特深度的编码和解码中是有用的，以产生具有不同比特深度的兼容的比特流，并且通过以相同的保真度压缩每个视频信号的不同分量来允许不同的比特深度（即， 相同的QP）。

公开(公告)号：US08548047B2

公开(公告)日：2013-10-01

申请号：US13565278

申请日：2012-08-02

申请人： Walter C. Gish ,  Christopher J. Vogt

发明人： Walter C. Gish ,  Christopher J. Vogt

IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04

CPC分类号： H04N19/124 ,  H04N19/126 ,  H04N19/184 ,  H04N19/61

摘要： The quantization parameter QP is well-known in digital video compression as an indication of picture quality. Digital symbols representing a moving image are quantized with a quantizing step that is a function QSN of the quantization parameter QP, which function QSN has been normalized to the most significant bit of the bit depth of the digital symbols. As a result, the effect of a given QP is essentially independent of bit depth a particular QP value has a standard effect on image quality, regardless of bit depth. The invention is useful, for example, in encoding and decoding at different bit depths, to generate compatible, bitstreams having different bit depths, and to allow different bit depths for different components of a video signal by compressing each with the same fidelity (i.e., the same QP).

公开(公告)号：US20130004074A1

公开(公告)日：2013-01-03

申请号：US13536785

申请日：2012-06-28

申请人： Walter C. Gish

发明人： Walter C. Gish

IPC分类号： G06K9/68 ,  G06K9/34

CPC分类号： G06T7/0002 ,  G06T2207/10024 ,  G06T2207/20076 ,  G06T2207/20208 ,  G06T2207/30168 ,  H04N5/2355

摘要： Given a set of two images with visual dynamic range (VDR), wherein the second image is an approximation of the first image, a standard dynamic range (SDR) equivalent peak value (EPV) is computed, wherein the EPV is smaller than the maximum pixel value of the first VDR image. An image assessment metric for the second image is computed using the EPV and an error measurement between the first image and the second image. The EPV may be computed using image statistics (e.g., mean and standard deviation) derived from the first VDR image or, if available, from its corresponding SDR image.

摘要翻译： 给定一组具有视觉动态范围（VDR）的两个图像，其中第二图像是第一图像的近似值，计算标准动态范围（SDR）等效峰值（EPV），其中EPV小于最大值 第一VDR图像的像素值。 使用EPV和第一图像与第二图像之间的误差测量来计算第二图像的图像评估度量。 可以使用从第一VDR图像导出的图像统计（例如，平均值和标准偏差）或者如果可用，从其相应的SDR图像来计算EPV。

公开(公告)号：US20120314773A1

公开(公告)日：2012-12-13

申请号：US13478695

申请日：2012-05-23

申请人： WALTER C. GISH ,  SAMIR HULYALKAR

发明人： WALTER C. GISH ,  SAMIR HULYALKAR

IPC分类号： H04N7/30 ,  H04N7/50

CPC分类号： H04N19/61 ,  H04N19/30

摘要： A visual dynamic range (VDR) signal and a standard dynamic range (SDR) signal are received. A first (e.g., MPEG-2) encoder encodes a base layer (BL) signal. A second encoder encodes an enhancement layer (EL). The EL signal represents information with which the VDR signal may be reconstructed, e.g., using the BL and the EL signals. The first encoder encodes the SDR signal with inverse discrete cosine transform (IDCT) coefficients that have a fixed precision, e.g., which represent fixed-point approximations of transform coefficients that may have arbitrary precisions. The BL signal is encoded in a stream that conforms with an Advanced Television Standards Committee (ATSC) standard. The EL is encoded in a stream that conforms with an ATSC enhanced vestigial sideband (E-VSB) standard. The BL and EL signals are combined; e.g., multiplexed, and transmitted together.

摘要翻译： 接收视觉动态范围（VDR）信号和标准动态范围（SDR）信号。 第一（例如，MPEG-2）编码器编码基本层（BL）信号。 第二编码器对增强层（EL）进行编码。 EL信号表示可以重构VDR信号的信息，例如使用BL和EL信号。 第一编码器用具有固定精度的反离散余弦变换（IDCT）系数对SDR信号进行编码，例如，其表示可能具有任意精度的变换系数的定点近似。 BL信号以符合高级电视标准委员会（ATSC）标准的流编码。 EL以符合ATSC增强残留边带（E-VSB）标准的流编码。 BL和EL信号组合; 例如，多路复用，并一起发送。