High definition signal mode automatic detection method having fault tolerant mechanism

A fault-tolerant mechanism and signal mode technology, applied in the field of televisions, can solve problems such as complicated operation, achieve the effects of simplified operation, accurate pattern recognition, and avoiding manual selection of signal format

Active Publication Date: 2009-09-23
HISENSE +1
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Problems solved by technology

This method complicates the user's operation. When the user does not understand the concept of signal mode, he will be confused by the several options shown and at a loss what to do

Method used

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  • High definition signal mode automatic detection method having fault tolerant mechanism
  • High definition signal mode automatic detection method having fault tolerant mechanism
  • High definition signal mode automatic detection method having fault tolerant mechanism

Examples

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Embodiment 1

[0027] Example 1. A method for automatic detection of high-definition signal modes with a fault-tolerant mechanism, such as Figure 1 ~ Figure 2 shown. It includes the following steps:

[0028] (1) Use the "input data processing, high-definition format detection" function module of the VPE1X chip to detect the input signal in real time. When the input mode changes, the module notifies the CPU;

[0029] (2) Simultaneously calculate the effective number of lines of the current input signal, the number of clocks (Hrtotal) of each line relative to the reference clock, and the polarity of HS and VS, and then compare with the known signal mode to determine the mode of the current input signal and notify CPU;

[0030] (3) In order to eliminate the unstable output signal of the signal source itself or the error of bus transmission, a fault-tolerant mechanism of mode detection is added. Only when the signal changes are detected for 3 consecutive times, it is fed back to the CPU sign...

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Abstract

The invention relates to an automatic detection method of a high-definition signal mode with a fault-tolerant mechanism, which belongs to the television technology. It includes using the "input data processing, high-definition format detection" function module of the VPElX chip to detect the input signal in real time. When the input mode changes, the module notifies the CPU; at the same time, it calculates the effective number of lines of the current input signal and the relative reference of each line. The number of clocks (Hrtotal) of the clock and the polarity of HS and VS are compared with the known signal mode to determine the mode of the current input signal and notify the CPU; in order to exclude the situation of unstable output signal or bus transmission error due to the signal source itself, The fault-tolerant mechanism of mode detection is added, and only when the signal changes are detected for 3 consecutive times, it is fed back to the steps such as marking the signal change of the CPU. It automatically recognizes the mode accurately, the user operation is simple, and it can freely switch between HD, YPbPr and VGA. Can be widely used in high-definition televisions.

Description

technical field [0001] The invention belongs to the technical field of television sets, and more specifically relates to the design of a high-definition signal mode automatic detection method with a fault-tolerant mechanism. Background technique [0002] The processing of high-definition and VGA signals by traditional TV sets is based on the FL12300 chip and adopts the "forced switching" mode. That is to say, when there is a signal input and it is necessary to switch to a high-definition signal, you must first press the high-definition switch button to enter such as image 3 The menu shown, and then the user selects the corresponding mode to enter viewing according to the different signal formats. When you don't want to watch, you must also exit the high-definition mode through the "Back" option of this menu. This method complicates the operation of the user. When the user does not understand the concept of the signal mode, he will be confused by the several options shown a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00H04N7/015
Inventor 孙昭全
Owner HISENSE
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