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    Moving image signal encoding apparatus and decoding apparatus
    1.
    再颁专利
    Moving image signal encoding apparatus and decoding apparatus 失效
    运动图像信号编码装置和解码装置

    公开(公告)号：USRE35910E

    公开(公告)日：1998-09-29

    申请号：US241810

    申请日：1994-05-12

    申请人： Atsushi Nagata ,  Kenichi Takahashi ,  Nobuyasu Takeguchi

    发明人： Atsushi Nagata ,  Kenichi Takahashi ,  Nobuyasu Takeguchi

    IPC分类号： H04N7/26 ,  H04N7/46 ,  H04N7/50

    CPC分类号： H04N19/587 ,  H04N19/30

    摘要： A moving image signal encoding apparatus includes: a frame decimating circuit for extracting .�.encoded.!. frames from an input moving image signal at specified intervals; a frame interpolating circuit for obtaining an interpolated frame between the .�.encoded.!. .Iadd.extracted .Iaddend.frames, and a circuit for obtaining an error formed by frame interpolation. A moving image signal decoding apparatus includes: a receiving circuit for extracting a frame code from an inputted signal; a frame decoding circuit for decoding the frame code to obtain a reproduced frame, and a frame interpolating circuit for obtaining an interpolated frame between the reproduced frames. By transmitting an error of the interpolated frame from the encoding apparatus to the decoding apparatus and correcting the error of the interpolated frame with the decoding apparatus, the error of the interpolated frame is eliminated. Alternatively, depending on the value of the error of the interpolated frame obtained with the encoding apparatus, a circuit determines the operation mode as to whether the frame interpolating circuit of the decoder carries out frame interpolation or preceding value holding and sends a flag to show the operation mode to the decoder, so that improvement occurs when the error of the interpolated frame is large.

    摘要翻译： 运动图像信号编码装置包括：帧抽取电路，用于以指定的间隔从输入的运动图像信号中提取[编码的]帧; 用于获得[编码]提取帧之间的内插帧的帧内插电路和用于获得由帧内插形成的误差的电路。 运动图像信号解码装置包括：从输入信号中提取帧码的接收电路; 用于解码帧码以获得再现帧的帧解码电路，以及用于获得再现帧之间的内插帧的帧内插电路。 通过从编码装置向解码装置发送插补帧的错误，并用解码装置校正内插帧的误差，消除了内插帧的误差。 或者，根据由编码装置获得的内插帧的误差值，电路确定解码器的帧内插电路是否执行帧插值或先前值保持的操作模式，并发送标志以显示 操作模式到解码器，从而当内插帧的误差大时，会发生改善。

    Moving image signal encoding apparatus and decoding apparatus
    2.
    发明授权
    Moving image signal encoding apparatus and decoding apparatus 失效
    移动图像信号编码装置和解码装置

    公开(公告)号：US5113255A

    公开(公告)日：1992-05-12

    申请号：US522121

    申请日：1990-05-11

    申请人： Atsushi Nagata ,  Kenichi Takahashi ,  Nobuyasu Takeguchi

    发明人： Atsushi Nagata ,  Kenichi Takahashi ,  Nobuyasu Takeguchi

    IPC分类号： H04N7/26 ,  H04N7/46 ,  H04N7/50

    CPC分类号： H04N19/587 ,  H04N19/61 ,  H04N19/30

    摘要： A moving image signal encoding apparatus includes: a frame decimating circuit for extracting encoded frames from an input moving image signal at specified intervals; a frame interpolating circuit for obtaining an interpolated frame between the encoded frames, and a circuit for obtaining an error formed by frame interpolation. A moving image signal decoding apparatus includes: a receiving circuit for extracting a frame code from an inputted signal; a frame decoding circuit for decoding the frame code to obtain a reproduced frame, and a frame interpolating circuit for obtaining an interpolated frame between the reproduced frames. By transmitting an error of the interpolated frame from the encoding apparatus to the decoding apparatus and correcting the error of the interpolated frame with the decoding apparatus, the error of the interpolated frame is eliminated. Alternatively, depending on the value of the error of the interpolated frame obtained with the encoding apparatus, a circuit determines the operation mode as to whether the frame interpolating circuit of the decoder carries out frame interpolation or preceding value holding and sends a flag to show the operation mode to the decoder, so that improvement occurs when the error of the interpolated frame is large.

    Signal encoding and decoding method and device
    3.
    发明授权
    Signal encoding and decoding method and device 失效
    信号编解码方法及装置

    公开(公告)号：US4953214A

    公开(公告)日：1990-08-28

    申请号：US222171

    申请日：1988-07-21

    申请人： Nobuyasu Takeguchi ,  Toshihide Akiyama ,  Kenichi Takahashi

    发明人： Nobuyasu Takeguchi ,  Toshihide Akiyama ,  Kenichi Takahashi

    IPC分类号： G06T9/00 ,  H04N7/26

    CPC分类号： H04N19/10

    摘要： A method of encoding and decoding image and/or audio signals includes an encoding step comprising previously preparing a quantization table which has pairs of a sampling interval and a quantized difference value, calculating a difference value between a given initial value and a sampling point succeeding to the initial value, comparing the calculated difference value with the quantization table, and searching the most matching quantization level. The search is started from the sampling point immediately succeeding to the initial value and then stopped upon finding of the matching quantization level. The index of that matching quantization level is transmitted. The decoding step comprises preparing the same quanitization table as used in the encoding step, determining the sampling interval and the quantized difference value based on the index received, and adding the quantized difference value to the initial value to obtain a decoded value. In case there are present two or more sampling intervals, the corresponding samples are interporated. As a result, the sampling interval is prolonged in the flat parts of signal and shortened in the steeply changing parts, thereby providing compression fit for human visual and auditory characteristics.