公开(公告)号：US5892552A

公开(公告)日：1999-04-06

申请号：US763722

申请日：1996-12-11

申请人： Young-Chul Kim

发明人： Young-Chul Kim

IPC分类号： H04N7/083 ,  G06T7/60 ,  G11B27/30 ,  H04N7/087 ,  H04N7/088 ,  H04N7/08

CPC分类号： H04N7/088 ,  G11B27/3054

摘要： A time code generator is provided and contains a detector, a serial-to-parallel (S/P) converter, a selector, a latch, a line window signal generator, a clock generator, and an interface. The detector detects serial time code information by comparing a composite video information having a digital conversion level with a selected reference level. The S/P converter converts the serial time code information into parallel time code information. The selector selectively outputs the composite video information or the parallel time code information as selected information. The latch latches the selected information as latched information in accordance with a predetermined transmission rate and outputs the latched information as an output signal. Also, the latch latches the selected information in response a time code clock signal. The line window signal generator generates a line window signal by comparing a line count value of the composite video information with preset time code start information and preset time code stop information. The clock generator generates the time code clock signal in response to the line window signal. The interfaces inputs external data and generates control signals which control the detector, the S/P converter, the selector, the latch, the line window signal generator, and the clock generator in accordance with the external data. Based on the above configuration, the time code information can be generated in response to externally supplied data, and thus, the generator is compatible with different types of time code information.

摘要翻译： 提供时间码发生器并且包含检测器，串并转换（S / P）转换器，选择器，锁存器，线窗信号发生器，时钟发生器和接口。 检测器通过将具有数字转换电平的复合视频信息与所选择的参考电平进行比较来检测串行时间码信息。 S / P转换器将串行时间码信息转换为并行时间码信息。 选择器选择性地输出复合视频信息或并行时间码信息作为所选择的信息。 锁存器根据预定的传输速率将所选信息锁存为锁存信息，并输出锁存信息作为输出信号。 此外，锁存器响应于时间码时钟信号锁存所选择的信息。 行窗口信号发生器通过将复合视频信息的行​​计数值与预设的时间码开始信息和预设时间码停止信息进行比较来生成行窗口信号。 时钟发生器响应于线窗口信号产生时间码时钟信号。 接口输入外部数据，并根据外部数据产生控制信号，控制信号控制检测器，S / P转换器，选择器，锁存器，线窗口信号发生器和时钟发生器。 基于上述配置，可以响应于外部提供的数据生成时间码信息，因此，发生器与不同类型的时间码信息兼容。

公开(公告)号：US5268773A

公开(公告)日：1993-12-07

申请号：US501802

申请日：1990-03-30

申请人： Yong-Woo Park ,  Min-Ki Yeo ,  Young-Chul Kim ,  Dong-Yool Kim ,  Hong-Jik Lee ,  Hideki Koide

发明人： Yong-Woo Park ,  Min-Ki Yeo ,  Young-Chul Kim ,  Dong-Yool Kim ,  Hong-Jik Lee ,  Hideki Koide

IPC分类号： H04N1/403 ,  H04N1/40

CPC分类号： H04N1/403

摘要： A document image signal processor of gray level for use in a facsimile. The document image signal processor establishes a local window and a broad window from document image signals scanned by a CCD image sensor. An average level and a level difference between a maximum and a minimum level of the image signals are extracted from the local window. A maximum threshold of the background of the document image is extracted from the broad window. Thus, the image signals can be binarized with an adaptive threshold. Accordingly, the inventive image signal processor provides improved image, although the document image is collected (scanned) from a material whose brightness distribution is considerably ununiform. The document image signal processor includes a line-memory for reading/writing the document image signal, a local window register for forming a local image window, a broad window register for forming a broad image window register, an address and clock generator for generating address and control clocks, and an adaptive threshold logic unit for producing black/white decision logic of the center pixel.

摘要翻译： 用于传真的灰度级文件图像信号处理器。 文件图像信号处理器从由CCD图像传感器扫描的文件图像信号建立局部窗口和宽窗口。 从本地窗口提取图像信号的最大和最小电平之间的平均电平和电平差。 从广视窗中提取文档图像的背景的最大阈值。 因此，图像信号可以用自适应阈值进行二值化。 因此，本发明的图像信号处理器提供改进的图像，尽管从其亮度分布非常不均匀的材料收集（扫描）文档图像。 文件图像信号处理器包括用于读取/写入文档图像信号的行存储器，用于形成局部图像窗口的局部窗口寄存器，用于形成宽幅图像窗口寄存器的宽窗口寄存器，用于产生地址的地址和时钟发生器 和控制时钟，以及用于产生中心像素的黑/白决定逻辑的自适应阈值逻辑单元。