Method and apparatus for auto-generation of horizontal synchronization of an analog signal to a digital display
    52.
    发明申请
    Method and apparatus for auto-generation of horizontal synchronization of an analog signal to a digital display 有权
    用于自动产生模拟信号到数字显示器的水平同步的方法和装置

    公开(公告)号:US20050104907A1

    公开(公告)日:2005-05-19

    申请号:US11021130

    申请日:2004-12-21

    Applicant: Greg Neal

    Inventor: Greg Neal

    CPC classification number: G09G5/006 G09G3/3611 G09G5/008

    Abstract: A method, apparatus, and system for determining a horizontal resolution and a phase of an analog video signal arranged to display a number of scan lines each formed of a number of pixels is described. A number of initialization values are set where at least one of the initialization values is a current horizontal resolution and then a difference value for each immediately adjacent ones of the pixels is determined. Next, an edge flag value based upon the difference value is stored in at least one of a number of accumulators such that when at least one of the accumulators has a stored edge flag value that is substantially greater than those stored edge flag values in the other accumulators, then the horizontal resolution is set to the current resolution.

    Abstract translation: 描述了一种用于确定布置成显示由多个像素形成的多条扫描线的模拟视频信号的水平分辨率和相位的方法,装置和系统。 设定多个初始化值,其中至少一个初始化值是当前水平分辨率,然后确定每个紧邻的像素的差值。 接下来,基于差分值的边缘标志值被存储在多个累加器中的至少一个中,使得当至少一个累加器具有存储的边缘标志值时,其显着大于另一个中存储的边缘标志值 累加器,则水平分辨率设置为当前分辨率。

    Multisensing circuitry for class signals and stutter dial tone in visual
message waiting indicator
    53.
    发明授权
    Multisensing circuitry for class signals and stutter dial tone in visual message waiting indicator 失效
    视觉消息等待指示器中的类信号和静音拨号音的多感测电路

    公开(公告)号:US5825852A

    公开(公告)日:1998-10-20

    申请号:US685750

    申请日:1996-07-24

    CPC classification number: H04M3/537 H04M1/82

    Abstract: A VMWI (Visual Message Waiting Indicator) multisense detection device solves both the problem of long CLASS VMWI signal retransmission delays and unreliable CLASS VMWI signal transmission by simultaneously enabling both stutter dial tone detection and CLASS VMWI signal detection. The multisense device samples the line each time the phone is placed on-hook or after the phone goes unanswered after a ring. If a valid CLASS VMWI signal is detected before the scheduled dial tone test, the dial tone test will be canceled. If no CLASS VMWI signal is detected, after a given amount of time, the VMWI device automatically enables stutter dial tone detection. The detection circuitry periodically polls for a preamble field of the CLASS signal to determine whether a valid CLASS signal is about to be transmitted. If the preamble indicates a CLASS signal is being transmitted, the detection circuitry remains on and the CLASS signal is received and processed. If no signal is detected during the time period for the preamble, the detection circuitry is shut off until the next polling period. This polling technique allows the VMWI detection device to operate only on batteries for long periods of time.

    Abstract translation: VMWI(可视消息等待指示)多重检测设备通过同时启用口令拨号音检测和CLASS VMWI信号检测来解决长类别的VMWI信号重传延迟和不可靠的CLASS VMWI信号传输问题。 多声道设备每次将手机挂机挂起或在手机未响应之后对其进行采样。 如果在预定拨号音测试之前检测到有效的CLASS VMWI信号,拨号音测试将被取消。 如果没有检测到类别的VMWI信号,则在给定的时间后,VMWI设备自动启用口音拨号音检测。 检测电路周期性地轮询CLASS信号的前同步码字段,以确定是否有效的CLASS信号被发送。 如果前导码指示CLASS信号正在发送,则检测电路保持接通并且CLASS信号被接收和处理。 如果在前导码的时间段期间没有检测到信号,则检测电路被切断直到下一个轮询周期。 这种轮询技术允许VMWI检测设备只能在电池上长时间运行。

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