System and method for improving transrating of MPEG-2 video
    1.
    发明授权
    System and method for improving transrating of MPEG-2 video 有权
    改进MPEG-2视频转换的系统和方法

    公开(公告)号:US07804899B1

    公开(公告)日:2010-09-28

    申请号:US09905600

    申请日:2001-07-13

    IPC分类号: H04B1/66

    CPC分类号: H04N7/24

    摘要: The present invention discloses how a transcoder may be used to reduce the bit rate of an MPEG-2 stream by transmitting only the visible area of the movie specified by pan-scan directives. Because the pan-scan conversion is performed prior to transmission, not immediately before display, the non-viewed portion of video does not need to be transmitted.

    摘要翻译: 本发明公开了如何通过仅传送由pan-scan指令指定的电影的可见区域来降低MPEG-2流的比特率的代码转换器。 由于在发送前进行全景扫描转换,不是在显示之前立即进行,所以不需要发送视频的非观看部分。

    Method and/or apparatus for reducing the complexity of H.264 B-frame encoding using selective reconstruction
    2.
    发明申请
    Method and/or apparatus for reducing the complexity of H.264 B-frame encoding using selective reconstruction 有权
    用于使用选择性重建降低H.264 B帧编码的复杂度的方法和/或装置

    公开(公告)号:US20070263724A1

    公开(公告)日:2007-11-15

    申请号:US11879944

    申请日:2007-07-19

    IPC分类号: H04N11/04

    摘要: A method for implementing B-frame prediction in video compression comprising the steps of (A) setting a prediction flag (i) “off” if B-frames are used for block prediction and (ii) “on” if B-frames are not used for block prediction, (B) if the prediction flag is off, generating an output video signal in response to an input video signal by performing an inverse quantization step and an inverse transform step in accordance with a predefined coding specification and (C) if the prediction flag is on, bypassing the inverse quantization step and the inverse transform step.

    摘要翻译: 一种在视频压缩中实现B帧预测的方法,包括以下步骤:(A)如果B帧用于块预测,则设置预测标志(i)“关闭”,以及(ii)如果B帧不是“ (B)如果预测标志关闭,则通过根据预定义的编码规范执行逆量化步骤和逆变换步骤,响应于输入视频信号产生输出视频信号,(C)如果 该预测标志位于旁路逆量化步骤和逆变换步骤。

    Rate control method for video transcoding
    3.
    发明授权
    Rate control method for video transcoding 有权
    视频转码速率控制方法

    公开(公告)号:US07170938B1

    公开(公告)日:2007-01-30

    申请号:US09934975

    申请日:2001-08-21

    IPC分类号: H04N7/12

    摘要: The present invention discloses a system and method for rate control of MPEG video streams to achieve a target bit rate in a transcoder at the best visual quality possible. The invention monitors video buffer fullness for selecting the amount of rate reduction necessary to achieve a target bit rate. The invention also utilizes a method for selective requantization of DCT coefficients to assure visual quality.

    摘要翻译: 本发明公开了一种用于MPEG视频流的速率控制的系统和方法,以在可能的最佳视觉质量下实现代码转换器中的目标比特率。 本发明监视视频缓冲器充满度以选择实现目标比特率所需的速率降低量。 本发明还利用DCT系数的选择性重新排序以确保视觉质量的方法。

    Method and/or apparatus for reducing the complexity of non-reference frame encoding using selective reconstruction
    4.
    发明申请
    Method and/or apparatus for reducing the complexity of non-reference frame encoding using selective reconstruction 有权
    用于使用选择性重建降低非参考帧编码的复杂度的方法和/或装置

    公开(公告)号:US20050063465A1

    公开(公告)日:2005-03-24

    申请号:US10667948

    申请日:2003-09-22

    摘要: A method for implementing non-reference frame prediction in video compression comprising the steps of (A) setting a prediction flag (i) “off” if non-reference frames are used for block prediction and (ii) “on” if non-reference frames are not used for block prediction, (B) if the prediction flag is off, generating an output video signal in response to an input video signal by performing an inverse quantization step and an inverse transform step in accordance with a predefined coding specification and (C) if the prediction flag is on, bypassing the inverse quantization step and the inverse transform step.

    摘要翻译: 一种用于在视频压缩中实现非参考帧预测的方法,包括以下步骤:(A)如果非参考帧用于块预测,则将预测标志(i)设置为“关闭”,以及(ii)如果非参考 帧不用于块预测,(B)如果预测标志关闭,则通过根据预定义的编码规范执行逆量化步骤和逆变换步骤,响应于输入视频信号生成输出视频信号,并且( C)如果预测标志为ON,则绕过逆量化步骤和逆变换步骤。

    Method for video deinterlacing and format conversion
    5.
    发明申请
    Method for video deinterlacing and format conversion 有权
    视频去隔行和格式转换的方法

    公开(公告)号:US20080117330A1

    公开(公告)日:2008-05-22

    申请号:US12018544

    申请日:2008-01-23

    IPC分类号: H04N7/01

    摘要: A method for deinterlacing a picture is disclosed. The method generally includes the steps of (A) generating a plurality of primary scores by searching along a plurality of primary angles for an edge in the picture proximate a location interlaced with a field of the picture, (B) generating a plurality of neighbor scores by searching for the edge along a plurality of neighbor angles proximate a particular angle of the primary angles corresponding to a particular score of the primary scores having a best value and (C) identifying a best score from a group of scores consisting of the particular score and the neighbor scores to generate an interpolated sample at the location.

    摘要翻译: 公开了一种用于去隔行扫描图像的方法。 该方法通常包括以下步骤:(A)通过沿图像中的边缘邻近的图像的边缘沿多个主角度搜索生成多个主分数,(B)生成多个相邻分数 通过搜索沿着与具有最佳值的主分数的特定分数相对应的主角度的特定角度的多个相邻角度的边缘,以及(C)从由特定分数组成的分数组中识别最佳分数 和邻居得分,以在该位置生成内插样本。

    Method and apparatus for MPEG-2 to VC-1 video transcoding
    6.
    发明申请
    Method and apparatus for MPEG-2 to VC-1 video transcoding 有权
    MPEG-2到VC-1视频转码的方法和装置

    公开(公告)号:US20070030906A1

    公开(公告)日:2007-02-08

    申请号:US11198694

    申请日:2005-08-05

    IPC分类号: H04N11/02

    摘要: A method for transcoding from an MPEG-2 format to a VC-1 format is disclosed. The method generally comprises the steps of (A) decoding an input video stream in the MPEG-2 format to generate a picture; (B) determining a mode indicator for the picture; and (C) coding the picture into an output video stream in the VC-1 format using one of (i) a VC-1 field mode coding and (ii) a VC-1 frame mode coding as determined from the mode indicator.

    摘要翻译: 公开了一种从MPEG-2格式转换为VC-1格式的方法。 该方法通常包括以下步骤:(A)以MPEG-2格式对输入视频流进行解码以产生图像; (B)确定图像的模式指示符; 以及(C)使用(i)从模式指示符确定的VC-1场模式编码和(ii)VC-1帧模式编码中的一个将图像编码为VC-1格式的输出视频流。

    Method and apparatus for MPEG-2 to H.264 video transcoding
    7.
    发明申请
    Method and apparatus for MPEG-2 to H.264 video transcoding 有权
    用于MPEG-2至H.264视频转码的方法和装置

    公开(公告)号:US20070030904A1

    公开(公告)日:2007-02-08

    申请号:US11198456

    申请日:2005-08-05

    IPC分类号: H04N11/02

    摘要: A method for transcoding from an MPEG-2 format to an H.264 format is disclosed. The method generally comprises the steps of (A) decoding an input video stream in the MPEG-2 format to generate a plurality of macroblocks; (B) determining a plurality of indicators from a pair of the macroblocks, the pair of the macroblocks being vertically adjoining; and (C) coding the pair of the macroblocks into an output video stream in the H.264 format using one of (i) a field mode coding and (ii) a frame mode coding as determined from the indicators.

    摘要翻译: 公开了一种从MPEG-2格式转码为H.264格式的方法。 该方法通常包括以下步骤:(A)以MPEG-2格式解码输入视频流以产生多个宏块; (B)从一对宏块中确定多个指示符,所述一对宏块垂直相邻; 以及(C)使用(i)场模式编码和(ii)从指标确定的帧模式编码中的一个,将该对宏块编码为H.264格式的输出视频流。

    Programmable quantization dead zone and threshold for standard-based H.264 and/or VC1 video encoding
    8.
    发明申请
    Programmable quantization dead zone and threshold for standard-based H.264 and/or VC1 video encoding 有权
    基于标准的H.264和/或VC1视频编码的可编程量化死区和阈值

    公开(公告)号:US20060126724A1

    公开(公告)日:2006-06-15

    申请号:US11010029

    申请日:2004-12-10

    摘要: A video encoder comprising an encoder circuit, a quantizer circuit and a control circuit. The encoder circuit may be configured to generate a number of coefficient values in response to a video stream and a number of quantized values. The quantizer circuit may be configured to generate the number of quantized values in response to the coefficient values, two or more quantization dead zones and two or more offsets. The control circuit may be configured to set the two or more quantization dead zones and the two or more offsets to different values. The two or more quantization dead zones and the two or more offsets are independently programmable.

    摘要翻译: 一种视频编码器,包括编码器电路,量化器电路和控制电路。 编码器电路可以被配置为响应于视频流和多个量化值而生成多个系数值。 量化器电路可以被配置为响应于系数值,两个或更多个量化死区和两个或更多个偏移量而产生量化值的数量。 控制电路可以被配置为将两个或更多个量化死区和两个或更多个偏移设置为不同的值。 两个或多个量化死区和两个或更多个偏移是可独立编程的。

    Dynamic GOP system and method for digital video encoding
    9.
    发明授权
    Dynamic GOP system and method for digital video encoding 失效
    动态GOP系统和数字视频编码方法

    公开(公告)号:US06959044B1

    公开(公告)日:2005-10-25

    申请号:US09935140

    申请日:2001-08-21

    IPC分类号: H04N7/12 H04N7/26 H04N7/50

    摘要: This invention discloses an intra-frame complexity based dynamic GOP system and method for the encoding of MPEG-2 video streams. The present invention may be used as a rate control tool to improve video quality. The selective insertion of low complexity I frames in scene changes such as fades is disclosed. It is disclosed that the selective use of I frames in certain scene change situations can improve encoder performance, particularly when encoding at a low bit rate.

    摘要翻译: 本发明公开了一种用于编码MPEG-2视频流的基于帧内复杂度的动态GOP系统和方法。 本发明可以用作速率控制工具来改善视频质量。 公开了在诸如渐变的场景变化中选择性地插入低复杂度I帧。 公开了在某些场景变化情况下选择性使用I帧可以提高编码器性能,特别是当以低比特率进行编码时。

    Embedded picture PSNR/CRC data in compressed video bitstream
    10.
    发明申请
    Embedded picture PSNR/CRC data in compressed video bitstream 有权
    嵌入图像压缩视频比特流中的PSNR / CRC数据

    公开(公告)号:US20050216815A1

    公开(公告)日:2005-09-29

    申请号:US10812286

    申请日:2004-03-29

    IPC分类号: H03M13/00 H04N7/26 H04N7/66

    CPC分类号: H04N19/46 H04N19/70

    摘要: A method for processing an input signal is disclosed. The method generally includes the steps of (A) extracting a compressed signal and a first checksum from the input signal, (B) generating a decompressed signal by decompressing the compressed signal, (C) calculating a second checksum for the decompressed signal and (D) generating a result by comparing the first checksum to the second checksum.

    摘要翻译: 公开了一种处理输入信号的方法。 该方法通常包括以下步骤:(A)从输入信号中提取压缩信号和第一校验和,(B)通过解压缩压缩信号产生解压缩信号,(C)计算解压缩信号的第二校验和和(D )通过将第一校验和与第二校验和进行比较来生成结果。