Apparatus for sampling and displaying an auxiliary image with a main
image to eliminate a spatial seam in the auxiliary image during freeze
frame operation
    3.
    发明授权
    Apparatus for sampling and displaying an auxiliary image with a main image to eliminate a spatial seam in the auxiliary image during freeze frame operation 有权
    用于采用主图像采样和显示辅助图像以在冷冻帧操作期间消除辅助图像中的空间接缝的装置

    公开(公告)号:US6046777A

    公开(公告)日:2000-04-04

    申请号:US125319

    申请日:1998-08-17

    IPC分类号: H04N5/45 H04N5/445

    CPC分类号: H04N5/45

    摘要: Apparatus for combining an auxiliary image and a main image includes a source of a main image signal and a source of samples representing an auxiliary image signal. A subsampler selectively subsamples the auxiliary image samples in either a quincunx subsampling pattern or a rectangular subsampling pattern. A signal combiner combines the main image signal and a signal representing the subsampled auxiliary image samples to generate a combined image signal. A control circuit generates a freeze control signal for the subsampler which conditions it to take samples in the rectangular subsampling pattern during a freeze frame operation, and in the quincunx sampling pattern otherwise.

    摘要翻译: PCT No.PCT / US97 / 04782 Sec。 371日期1998年8月17日第 102(e)日期1998年8月17日PCT 1997年3月6日PCT公布。 公开号WO97 / 33428 PCT 日期1997年9月12日用于组合辅助图像和主图像的装置包括主图像信号的源和表示辅助图像信号的样本源。 子采样器选择性地对辅助图像样本进行二次采样,采用五次子采样模式或矩形子采样模式。 信号组合器组合主图像信号和表示子采样的辅助图像样本的信号以生成组合图像信号。 控制电路产生用于二次采样器的冻结控制信号,该控制信号使其在冻结帧操作期间以矩形子采样模式采样,否则在五次采样模式中生成采样。

    Process and apparatus for converting an MPEG-2 bitstream into SMPTE-259
compatible bitstream
    5.
    发明授权
    Process and apparatus for converting an MPEG-2 bitstream into SMPTE-259 compatible bitstream 失效
    用于将MPEG-2比特流转换为SMPTE-259兼容比特流的过程和装置

    公开(公告)号:US6028639A

    公开(公告)日:2000-02-22

    申请号:US994078

    申请日:1997-12-19

    摘要: A process and apparatus for converting an MPEG-2 bitstream into an SMPTE-259 compatible bitstream is characterized by a frame rate converter which is selectively enabled to drop every 1001st frame of the incoming MPEG-2 bitstream depending on the input bitstream frame rate. If the input bitstream frame rate is other than 29.97 or 59.94 Hz, a frame dropper is enabled to discard every 1001st frame. The present converter can convert many different types of input bitstreams, such as all I types, IPIP types, or complex GOP types containing I, P, and B frames. The enabled frame dropper will drop either the I or P frame if it occurs as the 1001st frame, but if the 1001st frame is of the B frame type, the pixel information of the B frame is dropped. This produces a minimum in loss of information during the conversion. The format converter allows existing SMPTE-259 routing equipment to route and utilize MPEG-2 bitstreams, such as HDTV applications.

    摘要翻译: 用于将MPEG-2比特流转换为SMPTE-259兼容比特流的过程和装置的特征在于帧速率转换器,其被选择性地使能够根据输入的比特流帧速率丢弃进入的MPEG-2比特流的每第1001帧。 如果输入比特流帧速率不是29.97或59.94Hz,则可以使用帧丢弃器来丢弃每1​​001st帧。 本转换器可以转换许多不同类型的输入比特流,诸如所有I类型,IPIP类型或包含I,P和B帧的复杂GOP类型。 启用帧丢弃器如果发生在第1001帧时将丢弃I帧或P帧,但是如果第1001帧是B帧类型,则丢弃B帧的像素信息。 这会在转换过程中产生最少的信息丢失。 格式转换器允许现有的SMPTE-259路由设备路由和利用MPEG-2比特流,如HDTV应用。

    Hybrid global/local bit rate control
    9.
    发明授权
    Hybrid global/local bit rate control 失效
    混合全局/本地比特率控制

    公开(公告)号:US5986712A

    公开(公告)日:1999-11-16

    申请号:US4661

    申请日:1998-01-08

    IPC分类号: H04N7/26 H04N7/50

    摘要: A current picture partitioned into a plurality of partitions is received and encoded by determining a total target number of encoded bits for the current picture to avoid overflow or underflow of a video buffer verifier (VBV) maintained by an encoder. The encoder determines a local target number of encoded bits for each partition of the current picture, in accordance with the total target number. A plurality of partition encoders encode each partition, respectively, in accordance with the local target number for said each partition, wherein each partition encoder maintains a local VBV having a local VBV fullness, to monitor local underflow or overflow conditions.

    摘要翻译: 通过确定当前图像的编码比特的总目标数量来避免分割成多个分区的当前图像,以避免由编码器维持的视频缓冲器验证器(VBV)的上溢或下溢。 编码器根据总目标数量确定当前图像的每个分区的编码比特的本地目标数量。 多个分区编码器分别根据所述每个分区的本地目标编号对每个分区进行编码,其中每个分区编码器维护具有局部VBV饱和度的本地VBV,以监视本地下溢或溢出状况。

    High-voltage power supply for video display apparatus
    10.
    发明授权
    High-voltage power supply for video display apparatus 失效
    高压电源用于视频显示设备

    公开(公告)号:US5982641A

    公开(公告)日:1999-11-09

    申请号:US130953

    申请日:1998-08-07

    CPC分类号: H04N3/185

    摘要: A high-voltage power supply of a video display apparatus provides an ultor voltage and a focus voltage to a cathode ray tube. A low-voltage power supply provides a variable voltage to a primary winding of a flyback transformer of the high-voltage power supply. The magnitude of the variable voltage is responsive to first and second feedback signals provided by first and second negative feedback paths. The first feedback signal is derived from the ultor voltage and is used to regulate the ultor voltage. The second feedback signal is provided by the low-voltage power supply via a path that bypasses the high-voltage power supply, and is summed with the first feedback signal to ensure that the focus voltage remains at or above a predetermined minimum voltage.

    摘要翻译: 视频显示装置的高压电源向阴极射线管提供阳极电压和聚焦电压。 低压电源为高压电源的回扫变压器的初级绕组提供可变电压。 可变电压的幅度响应于由第一和第二负反馈路径提供的第一和第二反馈信号。 第一反馈信号来源于阳极电压,用于调节阳极电压。 第二反馈信号由旁路高压电源的路径由低压电源提供,并且与第一反馈信号相加,以确保聚焦电压保持在或高于预定的最小电压。