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公开(公告)号：US4670782A
公开(公告)日：1987-06-02
申请号：US699961
申请日：1985-02-08
CPC分类号： H04N17/04
摘要： A television video pattern generator system comprises a keyboard for entering pulse width and timing parameters for a video scanning rate. The individual incremental pulse width and timing parameters for the horizontal and vertical synchronizing waveforms are entered into a keyboard. A pattern selector selects a particular pattern which the operator wants to display on the video screen. The entered values are stored in a memory and a central processing unit processes the entered parameters and causes horizontal and vertical generators to generate the horizontal and vertical scan signals. A sync generator receives inputs from the horizontal and vertical generators and generates the scan rate. A pattern generator receives inputs from the sync generator and a pattern selector and generates a video display pattern in accordance with the selected pattern parameters and the selected scan rate parameters. If it is desired to compute a scan rate rather than to build a custom scan rate the central processing unit will automatically calculate a scan rate based upon enter parameters so that the individual pulse width of the scan rate pulses are expressed as a percentage of total horizontal line time.
摘要翻译： 电视视频图案发生器系统包括用于输入脉冲宽度的键盘和用于视频扫描速率的定时参数。 水平和垂直同步波形的各个增量脉冲宽度和时序参数输入到键盘中。 图案选择器选择操作者想要在视频屏幕上显示的特定图案。 输入的值存储在存储器中，中央处理单元处理输入的参数，并使水平和垂直发生器产生水平和垂直扫描信号。 同步发生器接收来自水平和垂直发生器的输入并产生扫描速率。 模式生成器接收来自同步发生器和模式选择器的输入，并根据所选择的模式参数和所选择的扫描速率参数产生视频显示模式。 如果希望计算扫描速率而不是建立自定义扫描速率，则中央处理单元将基于输入参数自动计算扫描速率，使得扫描速率脉冲的单个脉冲宽度表示为总水平的百分比 行时间。
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公开(公告)号：US4536793A
公开(公告)日：1985-08-20
申请号：US456851
申请日：1983-01-10
CPC分类号： H04N5/10
摘要： A pulse stretching circuit for a raster display for causing certain vertical control pulses to either have the same widths or at least terminate at the same time in both the odd and even fields. The vertical blanking pulses or vertical sync pulses in the odd fields are stretched so that they terminate coincident with the trailing edges of the 2H rate horizontal blanking or sync pulses respectively.
摘要翻译： 用于光栅显示器的脉冲拉伸电路，用于使某些垂直控制脉冲具有相同的宽度或至少在奇数和偶数场中同时终止。 奇数场中的垂直消隐脉冲或垂直同步脉冲被拉伸，使得它们分别终止于2H速率水平消隐或同步脉冲的后沿。
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公开(公告)号：US4518995A
公开(公告)日：1985-05-21
申请号：US548226
申请日：1983-11-02
CPC分类号： H04N17/045
摘要： A selectable rate sync generator system for use with a television test pattern generator includes a master oscillator of predetermined frequency, selector switches for selecting the desired total horizontal line time, and a horizontal line trigger circuit for generating a train of clock pulses having twice the repetition rate (2H) of the line time selected. H rate blanking and drive pulses are generated in response to the clock pulses. Selector switches are provided for selecting a desired number of horizontal scanning lines in two fields, and a vertical trigger circuit generates vertical trigger pulses having the repetition rate (V) of the number of lines selected. V rate blanking and drive pulses are generated in a response to the V trigger pulses, and the H and V rate blanking pulses are summed to provide a composite blanking signal. H rate sync pulses are generated in a response to the clock pulses and are delayed therefrom by a predetermined interval. V rate sync pulses are generated in a response to the V rate blanking pulses, and the H and V sync pulses are summed to provide a composite sync signal.
摘要翻译： 一种与电视测试图形发生器一起使用的可选择速率同步发生器系统，包括预定频率的主振荡器，用于选择期望的总水平线时间的选择开关，以及用于产生具有两次重复的时钟脉冲串的水平线触发电路 速率（2H）的行时间选择。 响应于时钟脉冲产生H速率消隐和驱动脉冲。 提供选择开关用于在两个场中选择所需数量的水平扫描线，并且垂直触发电路产生具有所选线数的重复频率（V）的垂直触发脉冲。 在对V触发脉冲的响应中产生V速率消隐和驱动脉冲，并且将H和V速率消隐脉冲相加以提供复合消隐信号。 H速率同步脉冲是在对时钟脉冲的响应中产生的，并以预定间隔从其延迟。 在对V速率消隐脉冲的响应中产生V速率同步脉冲，并且将H和V同步脉冲相加以提供复合同步信号。
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公开(公告)号：US4417275A
公开(公告)日：1983-11-22
申请号：US196154
申请日：1980-10-10
CPC分类号： H04N17/045
摘要： A selectable rate sync generator system for use with a television test pattern generator includes a master oscillator of predetermined frequency, selector switches for selecting the desired total horizontal line time, and a horizontal line trigger circuit for generating a train of clock pulses having twice the repetition rate (2H) of the line time selected. H rate blanking and drive pulses are generated in response to the clock pulses. Selector switches are provided for selecting a desired number of horizontal scanning lines in two fields, and a vertical trigger circuit generates vertical trigger pulses having the repetition rate (V) of the number of lines selected. V rate blanking and drive pulses are generated in a response to the V trigger pulses, and the H and V rate blanking pulses are summed to provide a composite blanking signal. H rate sync pulses are generated in a response to the clock pulses and are delayed therefrom by a predetermined interval. V rate sync pulses are generated in a response to the V rate blanking pulses, and the H and V sync pulses are summed to provide a composite sync signal.
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