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    • 1. 发明授权
    • Recording and/or reproducing apparatus for recording and/or reproducing
image data compressed according to different compressing methods
    • 用于记录和/或再现根据不同压缩方法压缩的图像数据的记录和/或再现装置
    • US5585933A
    • 1996-12-17
    • US357156
    • 1994-12-15
    • Kenji IchigeTakao AraiMasuo OkuHiroo Okamoto
    • Kenji IchigeTakao AraiMasuo OkuHiroo Okamoto
    • H04N5/92H04N5/926H04N5/94H04N19/50H04N19/65H04N19/89H04N19/895H04N19/91H04N5/76
    • H04N5/9264H04N5/94
    • A recording and/or reproducing apparatus for recording and/or reproducing image signals compressed according to different compressing methods. This recording and/or reproducing apparatus includes a compressing circuit for compressing first image data according to a first image data compressing method, a selecting circuit supplied with the first image data thus compressed and encoded by the compressing circuit and second image data compressed and encoded according to a second image data compressing method and selecting any one of the first and second compressed image data, and a first error correction encoding circuit for error correction encoding the selected compressed image data. The recording and/or reproducing apparatus further includes a recording and/or reproducing circuit for recording and/or reproducing the error correction encoded data on and/or from a recording medium, a first error correction decoding circuit for error correction decoding the compressed image data reproduced by the recording and/or reproducing circuit, an image data expanding circuit for expanding the compressed image data that has been error-corrected by the error correction decoding circuit, and an output circuit for outputting the first image data expanded by the image data expanding circuit. The second image data has a bit rate not greater than that of the first image data.
    • 一种用于记录和/或再现根据不同压缩方法压缩的图像信号的记录和/或再现装置。 该记录和/或再现装置包括用于根据第一图像数据压缩方法压缩第一图像数据的压缩电路,提供有由压缩电路压缩和编码的第一图像数据的选择电路和根据 第二图像数据压缩方法,并且选择第一和第二压缩图像数据中的任何一个,以及用于对所选择的压缩图像数据进行纠错编码的第一纠错编码电路。 记录和/或再现装置还包括用于在记录介质上和/或从记录介质记录和/或再现纠错编码数据的记录和/或再现电路,用于对压缩图像数据进行纠错解码的第一纠错解码电路 由记录和/或再现电路再现的图像数据扩展电路,用于扩展由纠错解码电路进行了纠错的压缩图像数据,以及输出电路,用于输出由图像数据扩展扩展的第一图像数据 电路。 第二图像数据具有不大于第一图像数据的比特率。
    • 3. 发明授权
    • Picture signal digital processing unit
    • 图像信号数字处理单元
    • US5636316A
    • 1997-06-03
    • US283685
    • 1994-08-01
    • Masuo OkuYukio FujiiMasaru TakahashiKenji IchigeKeizo NishimuraAtsuo SugaShigemitsu HiguchiTomohide Sorihashi
    • Masuo OkuYukio FujiiMasaru TakahashiKenji IchigeKeizo NishimuraAtsuo SugaShigemitsu HiguchiTomohide Sorihashi
    • H04N9/797H04N9/804H04N5/92
    • H04N9/8047H04N9/7973
    • A digital processing unit for converting a digital picture signal into data by blocks and for correction encoding a variable-length encoded signal. This digital processing unit includes a digital data compressing section for dividing a picture signal into a plurality of number of blocks, and compressingly outputting digital data of this picture signal based on a processing unit of one or a few blocks, a buffer section for sequentially storing the digital data, and an error correction encoding section for sequentially reading the digital data from this buffer section, and structuring an inner code for each inner block structured by this digital data and structuring an outer code for each predetermined unit of inner blocks, to thereby structure two-dimensional error correction code blocks, to output an error correction code signal. Further, the error correction encoding section has the length of the digital data of the picture signal included in the inner code set to be equal to or larger than a mean code length of predetermined compressed blocks.
    • 一种数字处理单元,用于将数字图像信号转换成数据块并用于对可变长度编码信号进行校正编码。 该数字处理单元包括数字数据压缩部分,用于将图像信号分成多个块,并且基于一个或几个块的处理单元压缩输出该图像信号的数字数据;缓冲部分,用于顺序存储 数字数据和纠错编码部分,用于从该缓冲器部分顺序读取数字数据,并且构造由该数字数据构成的每个内部块的内部代码,并为每个内部块的每个预定单位构成外部代码,由此 结构二维纠错码块,输出纠错码信号。 此外,纠错编码部分将内部码中包括的图像信号的数字数据的长度设置为等于或大于预定压缩块的平均码长。
    • 7. 发明授权
    • Luminance/chrominance signal separation circuit having filter circuit
using pulse patterns suppressing circuit
    • 具有使用脉冲图案抑制电路的滤波电路的亮度/色度信号分离电路
    • US5231479A
    • 1993-07-27
    • US597411
    • 1990-10-15
    • Hitoaki OwashiKooji MinabeKatsuyuki WatanabeKoichi OnoKenji IchigeHiroto Yamauchi
    • Hitoaki OwashiKooji MinabeKatsuyuki WatanabeKoichi OnoKenji IchigeHiroto Yamauchi
    • H04N9/78
    • H04N9/78
    • A color picture signal processing circuit, a filter circuit and a luminance/carrier chrominance signal separation circuit implemented by employing the filter circuit. The circuit processing signal includes an adaptive-type (C) comb line filter through which the luminance signal is caused to pass. The output of the filter undergoes amplitude limitation in a limiter circuit, the output of which is subtracted from the original luminance signal. The carrier chrominance signal is added to the luminance signal to obtain a composite picture signal. The filter circuit is comprised of a pulse pattern suppressing circuit including a decision circuit for deciding which of positive and negative patterns the three adjacent data form constitute, a positive pulse pattern suppressing circuit, a negative pulse pattern suppressing circuit and a circuit selecting for either one of the output signal of the positive and negative pulse pattern suppressing circuits in accordance with the result of decision made by the decision circuit.
    • 通过采用滤波电路实现的彩色图像信号处理电路,滤波电路和亮度/载波色度信号分离电路。 电路处理信号包括使亮度信号通过的自适应型(C)梳状线滤波器。 滤波器的输出在限幅器电路中经受幅度限制,其输出从原始亮度信号中减去。 载波色度信号被加到亮度信号上以获得一个合成图像信号。 滤波器电路包括脉冲图形抑制电路,该脉冲图案抑制电路包括用于决定构成三个相邻数据形式的正和负图案中的哪一个的判定电路,正脉冲图案抑制电路,负脉冲图案抑制电路和用于任一个的电路选择 根据判定电路的判定结果,判定正,负脉冲图案抑制电路的输出信号。