TRANSCODER
    2.
    发明申请
    TRANSCODER 审中-公开

    公开(公告)号:US20120147969A1

    公开(公告)日:2012-06-14

    申请号:US13401198

    申请日:2012-02-21

    IPC分类号: H04N7/50

    摘要: If the number of frames in a GOP of an input stream is not less than 15, the GOP is determined as a control unit time. If the number of frames in the GOP is less than 15, the following GOP is connected thereto until the number of frames becomes not less than 15 and the connected GOPs are determined as a control unit time. After correcting the control unit time, the average input bit rate Sn in each control unit time is obtained, and by using information on the input stream including the average input bit rate Sn, a quantization step value of an output stream is calculated.

    摘要翻译: 如果输入流的GOP中的帧数不小于15,则将GOP确定为控制单元时间。 如果GOP中的帧数小于15,则连接到下一个GOP,直到帧的数量变得不小于15,并且所连接的GOP被确定为控制单元时间。 在校正控制单元时间之后,获得每个控制单元时间内的平均输入比特率Sn,并且通过使用包括平均输入比特率Sn的输入流的信息,计算输出流的量化步长值。

    TRANSCODER
    4.
    发明申请

    公开(公告)号:US20090238266A1

    公开(公告)日:2009-09-24

    申请号:US12394513

    申请日:2009-02-27

    IPC分类号: H04N7/26

    摘要: A category setting part sets a type of a decoded image based on characteristics of the decoded image which are fineness of the decoded image and an intensity of movement of the decoded image. A code amount setting part sets a target code amount of an output image based on the type of the decoded image. A quantization step value setting part sets a quantization step value of the output image based on the target code amount of the output image. A transcoder can set the target code amount of the output image depending on fineness of the decoded image. The transcoder can distribute the target code amount of the output image to a reference image and a predicted image depending on the intensity of movement of the decoded image.

    摘要翻译: 类别设定部根据作为解码图像的细度的解码图像的特性和解码图像的移动强度来设定解码图像的种类。 代码量设定部根据解码图像的种类来设定输出图像的目标代码量。 量化步长值设定部根据输出图像的目标码量设定输出图像的量化步长值。 代码转换器可以根据解码图像的细度来设置输出图像的目标代码量。 代码转换器可以根据解码图像的移动强度将输出图像的目标代码量分配给参考图像和预测图像。

    ENCODER
    5.
    发明申请
    ENCODER 有权
    编码器

    公开(公告)号:US20090225825A1

    公开(公告)日:2009-09-10

    申请号:US12367658

    申请日:2009-02-09

    IPC分类号: H04N7/26

    摘要: A reference differential value calculation part calculates a reference differential value by subtracting an accumulated value of the target amounts of codes from an accumulated value of the amounts of generated codes from the first period to the (n−1) period. A comparison part compares a cumulative differential value obtained by subtracting the cumulative amount of generated codes from the cumulative target amount of codes of the first to m-th picture frames in the n period with the reference differential value. If the cumulative differential value is larger than the reference differential value, stuffing bits are added to the m-th picture frame to be processed by the amount of codes obtained by subtracting the reference differential value from the cumulative differential value.

    摘要翻译: 参考差分值计算部分从第一周期到第(n-1)个周期的生成代码量的累计值中减去目标代码量的累加值来计算参考差分值。 比较部分将通过从n个周期中的第一至第m个图像帧的累积目标量的累加量减去生成的代码获得的累积差分值与参考差分值进行比较。 如果累积微分值大于参考差分值,则将填充比特添加到通过从累积微分值减去参考差分值而获得的代码量来处理的第m个图像帧。

    TRANSCODER
    6.
    发明申请
    TRANSCODER 审中-公开

    公开(公告)号:US20090237569A1

    公开(公告)日:2009-09-24

    申请号:US12400132

    申请日:2009-03-09

    IPC分类号: H04N5/14

    摘要: A scene change detection part detects a scene change based on a characteristic amount of an input image. A target code amount setting part executes correction by a correction code amount on a target code amount previously set for suppressing variation of an output code amount around the time of scene change. A quantization step value setting part sets a quantization step value based on the target code amount. That is to say, a transcoder 1 does not detect a scene change by previously reading an input image or by detecting variation of the output code amount.

    摘要翻译: 场景变化检测部根据输入图像的特征量来检测场景变化。 目标代码量设定部通过校正代码量来执行对预先设定的用于抑制场景变化时的输出代码量的变动的目标代码量的校正。 量化步长值设定部根据目标代码量来设定量化步长值。 也就是说,代码转换器1不通过预先读取输入图像或通过检测输出代码量的变化来检测场景变化。

    Transcoder
    7.
    发明授权
    Transcoder 有权
    转码器

    公开(公告)号:US08780977B2

    公开(公告)日:2014-07-15

    申请号:US12367765

    申请日:2009-02-09

    IPC分类号: H04N7/12

    摘要: In a transcoder, a decoder decodes a stream and an encoder encodes the stream again. The encoder calculates the quantization step value by using an average period bit rate (ASn(M)) of a first stream or an average period bit rate (ACn(M)) of a second stream. Buffers store bit rates (Sn, Cn) of the first and second streams for M periods, respectively. The encoder uses the average period bit rate (ASn(M)) of the first stream or then average period bit rate (ACn(M)) of the second stream in any one of the periods M1, M2 and M3 among M periods.

    摘要翻译: 在代码转换器中,解码器解码流并且编码器再次对流进行编码。 编码器通过使用第二流的第一流的平均周期比特率(ASn(M))或平均周期比特率(ACn(M))来计算量化步长值。 缓冲器分别存储M个周期的第一和第二个流的比特率(Sn,Cn)。 编码器在M个周期中使用第一个流的平均周期比特率(ASn(M)),或者在M个周期中的任何一个周期M1,M2和M3中的第二个流的平均周期比特率(ACn(M))。

    Transcoding/encoding with code amount adjustment and stuffing bits
    8.
    发明授权
    Transcoding/encoding with code amount adjustment and stuffing bits 有权
    用代码量调整和填充位的转码/编码

    公开(公告)号:US08619864B2

    公开(公告)日:2013-12-31

    申请号:US12367658

    申请日:2009-02-09

    IPC分类号: H04N7/12 H04N11/02

    摘要: A reference differential value calculation part calculates a reference differential value by subtracting an accumulated value of the target amounts of codes from an accumulated value of the amounts of generated codes from the first period to the (n−1) period. A comparison part compares a cumulative differential value obtained by subtracting the cumulative amount of generated codes from the cumulative target amount of codes of the first to m-th picture frames in the n period with the reference differential value. If the cumulative differential value is larger than the reference differential value, stuffing bits are added to the m-th picture frame to be processed by the amount of codes obtained by subtracting the reference differential value from the cumulative differential value.

    摘要翻译: 参考差分值计算部分从第一周期到第(n-1)个周期的生成代码量的累计值中减去目标代码量的累加值来计算参考差分值。 比较部分将通过从n个周期中的第一至第m个图像帧的累积目标量的累加量减去生成的代码获得的累积差分值与参考差分值进行比较。 如果累积微分值大于参考差分值,则将填充比特添加到通过从累积微分值减去参考差分值而获得的代码量来处理的第m个图像帧。

    Transcoder
    9.
    发明授权
    Transcoder 有权
    转码器

    公开(公告)号:US08548046B2

    公开(公告)日:2013-10-01

    申请号:US12394513

    申请日:2009-02-27

    摘要: A category setting part sets a type of a decoded image based on characteristics of the decoded image which are fineness of the decoded image and an intensity of movement of the decoded image. A code amount setting part sets a target code amount of an output image based on the type of the decoded image. A quantization step value setting part sets a quantization step value of the output image based on the target code amount of the output image. A transcoder can set the target code amount of the output image depending on fineness of the decoded image. The transcoder can distribute the target code amount of the output image to a reference image and a predicted image depending on the intensity of movement of the decoded image.

    摘要翻译: 类别设定部根据作为解码图像的细度的解码图像的特性和解码图像的移动强度来设定解码图像的种类。 代码量设定部根据解码图像的种类来设定输出图像的目标代码量。 量化步长值设定部根据输出图像的目标码量设定输出图像的量化步长值。 代码转换器可以根据解码图像的细度来设置输出图像的目标代码量。 代码转换器可以根据解码图像的移动强度将输出图像的目标代码量分配给参考图像和预测图像。

    TRANSCODER
    10.
    发明申请

    公开(公告)号:US20110075737A1

    公开(公告)日:2011-03-31

    申请号:US12995357

    申请日:2009-03-12

    IPC分类号: H04N7/26 G06K9/46

    摘要: A generated code amount accumulation part adds up the amounts of generated codes of pictures in 1 GOP which are encoded up to the current stage. An upper limit code amount accumulation part adds up the upper limit amounts of codes of the pictures in the 1 GOP which are encoded up to the current stage. A transmission load of an image transmission system is taken into consideration in the setting of the upper limit amount of codes. An update ratio setting part outputs an update instruction to lower a target rate when the accumulated amount of generated codes exceeds the accumulated upper limit amount of codes. The update ratio setting part does not output the update instruction for lowering the target rate when the accumulated amount of generated codes does not exceed the accumulated upper limit amount of codes. A transcoder can predict whether or not there is a possibility that the load of transmitting image data will increase while each picture in 1 GOP is encoded.

    摘要翻译: 生成的代码量累积部分将编码到当前阶段的1个GOP中的图像的生成代码量相加。 上限码量累积部分将编码到当前阶段的1 GOP中的图像的上限量的数量相加。 在上限编码量的设定中考虑图像传输系统的传输负载。 当累积的代码量超过累积的上限代码量时,更新比率设置部分输出更新指令以降低目标速率。 当生成的代码的累积量不超过累积的上限代码量时,更新比率设置部分不输出用于降低目标速率的更新指令。 代码转换器可以预测在1 GOP中的每个图像被编码时是否存在发送图像数据的负载将增加的可能性。