会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Comb filter
    • COMB过滤器
    • US5231477A
    • 1993-07-27
    • US700855
    • 1991-05-16
    • Naoji OkumuraHirohiko Sakashita
    • Naoji OkumuraHirohiko Sakashita
    • H03H15/00H04N9/78
    • H04N9/78
    • A comb filter serves to process an input digital video signal which is derived from an analog video signal by a analog-to-digital conversion including a sampling process responsive to a system clock signal. The comb filter includes a separating device for separating the input video signal into a plurality of video signals which are offset with each other in timing and which have a clock rate equal to 1/N times a clock rate of the system clock signal where N denotes a predetermined natural number greater than 1. A first delaying device serves to delay a first output signal of the separating device. A chroma signal processor separates a first chroma signal in response to the first output signal of the separating device and an output signal of the first delaying device. A first subtracter serves to subtract the first chroma signal from the output signal of the first delaying device. A second delaying device serves to delay a second output signal of the separating device. An interpolating device serves to interpolate the first chroma signal into a second chroma signal to compensate for a difference in timing between the output signal of the second delaying device and the first chroma signal. A second subtracter serves to subtract the second chroma signal from the output signal of the second delaying device. A combining device serves to combine an output signal of the first subtracter and an output signal of the second subtracter into a luminance signal.
    • 4. 发明授权
    • Picture quality improving circuit using a cumulative histogram
    • 使用累积直方图的图像质量改进电路
    • US5388168A
    • 1995-02-07
    • US84064
    • 1993-06-30
    • Hirohiko SakashitaNaoji Okumura
    • Hirohiko SakashitaNaoji Okumura
    • G06T5/40H04N5/20
    • G06T5/40G06T5/009H04N5/20G06T2207/10016
    • A picture quality improving circuit for automatically obtaining a corrected image by capturing features of the input video signals. The circuit first compares an input luminance signal with a plurality of reference values, measures the results of the comparison by a plurality of counters and obtains a cumulative histogram within a predetermined period of time. Next, the cumulative histogram signals are stored in a latch circuit for a predetermined period of time, and an interpolation circuit determines and outputs a correction signal corresponding to the input luminance signal by interpolating the cumulative histogram. Accordingly, when a large number of dark signals exist in the input luminance signal, the cumulative histogram signals will describe an upwardly projecting graph, and the dark portions of the signal will be extended in a bright direction. Thereby, the picture quality can be improved.
    • 一种用于通过捕获输入视频信号的特征来自动获得校正图像的图像质量改善电路。 电路首先将输入亮度信号与多个参考值进行比较,通过多个计数器测量比较结果,并在预定时间段内获得累积直方图。 接下来,将积累的直方图信号存储在锁存电路中预定的时间段,并且内插电路通过内插累积直方图来确定并输出与输入的亮度信号相对应的校正信号。 因此,当输入亮度信号中存在大量暗信号时,累积直方图信号将描述向上投影的图形,并且信号的暗部将在明亮方向上延伸。 从而可以提高图像质量。
    • 5. 发明授权
    • Video chroma signal processing circuit
    • 视频色度信号处理电路
    • US5192996A
    • 1993-03-09
    • US788240
    • 1991-11-05
    • Hirohiko SakashitaTetsuo KutsukiNaoji Okumura
    • Hirohiko SakashitaTetsuo KutsukiNaoji Okumura
    • H04N5/14H04N9/68H04N9/77H04N11/04
    • H04N9/77
    • A video chroma signal processing circuit in which a composite video signal, formed of an analog luminance signal and an analog chrominance signal, is separated into Y and C components and converted into digital codes by AD converters and processed by processing circuits. The outputs of the processing circuits are converted into analog signals again with DA converters to produce a picture image; wherein, it is intended to obtain a wide band of a luminance signal by making efficient use of an AD converter for a chrominance signal and to improve horizontal resolution. The apparent sampling frequency is doubled by sampling the AD converter for a chrominance signal with a phase reverse to that of an AD converter for a luminance signal so as to improve the horizontal resolution of the luminance signal.
    • 一种视频色度信号处理电路,其中由模拟亮度信号和模拟色度信号形成的复合视频信号被分离成Y和C分量,并由AD转换器转换成数字码并由处理电路进行处理。 处理电路的输出再次用DA转换器转换为模拟信号以产生图像; 其目的在于通过有效地利用AD转换器获得色度信号的宽带,提高水平分辨率。 通过对与用于亮度信号的AD转换器的相位相反的色度信号的AD转换器采样AD视频采样频率,以提高亮度信号的水平分辨率。
    • 6. 发明授权
    • Video signal processing circuit for compressed picture insertion
function of television receiver
    • 视频信号处理电路,用于电视接收机的压缩图像插入功能
    • US5138455A
    • 1992-08-11
    • US705040
    • 1991-05-28
    • Naoji OkumuraHirohiko Sakashita
    • Naoji OkumuraHirohiko Sakashita
    • H04N5/265H04N5/45
    • H04N5/45
    • A video signal processing circuit for providing a compressed picture insertion function in a television receiver, whereby a compressed-size picture expressed by one video signal is displayed as an insert within a full-size picture that is expressed by another video signal, by demodulating and combining the video signals, which can be of respectively different television standards, such as the PAL and MUSE standards. The circuit utilizes only one demodulator circuit for one video signal and two demodulator circuits for the other signal. When one of the video signals is in accordance with a broadcast standard such as the MUSE standard, which requires a large-scale demodulator circuit, a significant reduction in overall circuit scale is achieved by comparsion with the prior art, in which two demodulator circuits are required for each of the video signals.
    • 一种用于在电视接收机中提供压缩图像插入功能的视频信号处理电路,由此将由一个视频信号表示的压缩大小的图像作为插入显示在由另一视频信号表示的全尺寸图像内,通过解调和 组合视频信号,其可以分别是不同的电视标准,例如PAL和MUSE标准。 该电路仅使用一个解调器电路用于一个视频信号,另外两个解调器电路用于另一个信号。 当其中一个视频信号符合诸如需要大规模解调器电路的MUSE标准的广播标准时,通过与现有技术的比较来实现总体电路规模的显着降低,其中两个解调器电路是 每个视频信号都需要。