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    • 1. 发明授权
    • Video signal processing apparatus
    • 视频信号处理装置
    • US06850694B1
    • 2005-02-01
    • US09640645
    • 2000-08-18
    • Eiji MoroKen SodeyamaHiroyuki HoriKatsuyuki WatanabeAkifumi Tabata
    • Eiji MoroKen SodeyamaHiroyuki HoriKatsuyuki WatanabeAkifumi Tabata
    • H04N5/765H04N5/7826H04N5/783H04N5/95H04N5/956H04N9/804H04N9/896
    • H04N9/896H04N5/78263H04N5/783H04N9/8042
    • The present invention relates to a video signal processing apparatus for outputting an inputted video signal after subjecting the video signal to time axis correction, particularly to a video signal processing apparatus preferable in the case of subjecting the video signal to image compression. In the case in which a nonstandard signal is inputted to an image compression circuit of an MPEG2 encoder or the like, a drawback of freezing image or generating block noise or the like is resolved. A time axis correcting circuit stores an input signal to a memory and reads the input signal at a timing delayed from V synchronization of the input signal by a predetermined time period. For that purpose, a read synchronizing signal generator is reset at respective input field. A reset position is set to a position preceding the read V synchronization position by 3H through 10H. It is detected whether the input signal is a non-interlace signal or a field length thereof is deviated from a standard value and in these cases, odd/even order or synchronization timing of a synchronizing signal is corrected. Further, when the input signal is a nonstandard signal, the input signal is outputted without passing through the image compression circuit by a changeover switch.
    • 视频信号处理装置本发明涉及一种视频信号处理装置,用于在对视频信号进行时间轴校正之后输出输入的视频信号,特别涉及在对视频信号进行图像压缩的情况下优选的视频信号处理装置。 在将非标准信号输入到MPEG2编码器等的图像压缩电路的情况下,解决图像冻结或产生块噪声等的缺陷。 时间轴校正电路将输入信号存储到存储器,并且以从输入信号的V同步延迟预定时间段的定时读取输入信号。 为此,读取同步信号发生器在相应的输入场复位。 复位位置被设定为读取V同步位置之前的位置3H到10H。 检测输入信号是不是隔行扫描信号还是其场长偏离标准值,在这些情况下,校正同步信号的奇数/偶数阶或同步定时。 此外,当输入信号是非标准信号时,输入信号不通过图像压缩电路通过转换开关输出。
    • 6. 发明授权
    • Recording/ reproducing apparatus and input/ output device
    • 记录/再现装置和输入/输出装置
    • US06587638B1
    • 2003-07-01
    • US09399085
    • 1999-09-20
    • Katsuyuki WatanabeHideo NishijimaHiroo OkamotoMotoyoshi Sasaki
    • Katsuyuki WatanabeHideo NishijimaHiroo OkamotoMotoyoshi Sasaki
    • H04N591
    • H04N5/44508H04N5/44504H04N5/85H04N5/913H04N9/7921H04N21/4325H04N21/4334H04N21/435H04N21/4627H04N2005/91314H04N2005/91328H04N2005/91371
    • A recording/reproducing apparatus is provided for effecting digital processing to convert an analog video signal into a digital signal without losing character data superimposed over a vertical blanking period of the analog video signal. The recording/reproducing apparatus for converting the analog video signal into the digital signal and recording/reproducing the converted digital signal has a detector which detects character data, which is superimposed over the vertical blanking period of the received analog video signal, at the recording time. A superimposer which encodes the detected character data and superimposes the encoded character data over a digital signal from which the character data was removed, whereby the digital signal with the superimposed character data is recorded on the recording media. There is also a detector which detects first copy guard data superimposed over the vertical blanking period and second copy guard data superimposed over a color burst signal; and an adder which adds the two detected copy guard data to a signal reproduced from the recording media.
    • 提供了一种用于进行数字处理以将模拟视频信号转换为数字信号而不会丢失在模拟视频信号的垂直消隐周期叠加的字符数据的记录/再现装置。 用于将模拟视频信号转换为数字信号并记录/再现转换的数字信号的记录/再现装置具有检测器,该检测器检测在记录时间叠加在所接收的模拟视频信号的垂直消隐周期上的字符数据 。 编码检测到的字符数据并将编码字符数据叠加在去除了字符数据的数字信号上的叠加器,由此具有叠加的字符数据的数字信号被记录在记录介质上。 还有一个检测器,其检测叠加在垂直消隐周期上的第一复制保护数据和叠加在色同步信号上的第二复制保护数据; 以及将两个检测到的复制保护数据添加到从记录介质再现的信号的加法器。