CN100543808C - The pixel moving method of television image - Google Patents

Abstract

A kind of pixel moving method of television image.Comprise (1) write-in program in host CPU, with I ²Register parameters value in the total line traffic control DPTV-SVP module of C and 8bit makes its per 30 seconds and changes once; (2) thus make image pixel carry out per 30 seconds once moving, and determine up and down moving direction by a global variable.(2) be specially: the timer initial value was made as 30 seconds, and when its count value was kept to 0, H_start increased identical constant with the H_end register value, made each picture element level of image setpoint distance that moves to right; The timer initial value is reset to 30 seconds, and when its count value was kept to 0, H_start deducted identical constant with the H_end register value, made each picture element horizontal left setpoint distance of image; Change V_start and V_end register value according to this, realize the vertical moving of each picture element of image; Go round and begin again.It can avoid burning of kinescope and aging, life-saving, keeps the high-quality of picture.

Description

The pixel moving method of television image

Technical field

The invention belongs to technical field of television sets, more particularly relate to the design of the pixel moving method of television image.

Background technology

The displaying principle of cathode ray tube (CRT) TV is: the electron beam that is sent by the gun cathode of kinescope inside, after strength control, focusing and acceleration, become tiny electron stream, effect through deflection coil departs to correct target again, pass through the aperture or the fence of shadow mask, bombard on the fluorescent powder on the video screen, fluorescent powder is activated, and just can send light.R, G, B three fluorescence point are lighted by the electron stream of different proportion intensity, will produce various colors.Each pixel that demonstrates picture all comprises a redness, green and blue phosphor.

Traditional televisor, when showing same fixed image for a long time on the screen, as the inactive bright pattern of generations such as recreation, computing machine, or when watching the normal tv program, the station symbol in the program is presented at the fixed position (generally being in the screen upper left corner) on the screen always.This moment, the strong electron beam at high brightness place bombarded on fluoroscopic fixed fluorescent powder always, will cause so herein fluorescent powder burnt very soon, aging, thereby on screen, stay the branding of still image or station symbol.Influence the quality of the picture that televiews.

Summary of the invention

Purpose of the present invention just is to overcome above-mentioned shortcoming and defect, and a kind of pixel moving method of television image is provided.It is by the picture element in the mobile TV picture regularly, avoid a highlighted picture fixing for a long time show the kinescope that caused burning and aging, thereby prolong teletron serviceable life, keep the high-quality of television image.

In order to achieve the above object, the present invention includes following steps:

Step 1, in the host CPU of televisor write-in program, pass through I ²Register parameters value among C and the 8bit bus control figure video image processing module DPTV-SVP changes once its per 30 seconds;

Thereby step 2 makes the pixel of television image picture carry out per 30 seconds once moving, and determines up and down moving direction, repeated execution of steps 2 by a global variable.

Wherein the concrete grammar of step 2 is:

Step 2-1, the timer initial value was made as 30 seconds, when the timer count value was kept to 0, the value of H_start register and H_end register all increased identical constant respectively, at this moment, and each picture element level of image frame setpoint distance that moves to right; Then the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of H_start register and H_end register all deducted identical constant respectively, at this moment, and each picture element horizontal left setpoint distance of image frame;

Step 2-2, the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of V_start register and V_end register all increased identical constant respectively, and at this moment, each picture element of image frame vertically moves down setpoint distance; And then the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of V_start register and V_end register all deducted identical constant respectively, at this moment, each picture element pan-up setpoint distance of image frame;

Step 2-3, return step 2-1.

Wherein, said timer, H_start register, H_end register, V_start register and V_end register are built among the digital video processing module DPTV-SVP.

Digital video processing module DPTV-SVP can be the DPTV-SVP type of Trident company.

TV signal is separated picture signal by trap after receiving into through tuner with voice signal, voice signal send the acoustic processing chip to handle; Picture signal exports brightness signal Y after switching chip and carrier chrominance signal C, YC signal directly send the DPTV-SVP decoding chip to handle.The rgb signal of VGA and high definition YPBPR signal carry out A/D conversion back output 24bit signal through AD9985 to be handled to DPTV-SVP.The picture-in-picture signal send DPTV-SVP through output 8bit signal behind the VPX3226.Synthesize at chip TDA9332H through picture signal and osd signal after the DPTV-SVP processing, export rgb signal at last and send the projection cathode-ray tube video amplifier circuit.After the image line field signal enters chip TDA9332H and carries out frequency multiplication from DPTV-SVP, give the projection cathode-ray tube deflection coil through scan deflection circuit output row field signal.

Carrying out picture signal when handling, employing be the DPTV-SVP of Trident company, as shown in Figure 1.Its ultimate principle is: write-in program in host CPU, pass through I ²Register value among the total line traffic control DPTV-SVP of C and 8bit, when TV was not in plant states or ageing state, the television image picture carried out once moving in per 30 seconds, determined up and down moving direction by a global variable.

Task of the present invention comes to this and finishes.

The present invention adopts the register value of CPU control picture processing chip, realizes moving of image frame picture element by the mode that changes register value.The ingenious DPTV-SVP register parameters function of having used, only needing increases corresponding software programs, just can realize a brand-new function, does not increase cost, can protect kinescope can not burnt under highlighted fixed image, prolongs the kinescope life-span when normal the use.It can be widely used in the televisor of various types.

Description of drawings

Fig. 1 is the functional-block diagram of television signal of the present invention.

Fig. 2 moves synoptic diagram for the capable field sync signal pixel of image of embodiment 1.

Embodiment

Embodiment 1.A kind of pixel moving method of television image may further comprise the steps:

(1) write-in program in the host CPU of televisor passes through I ²Register parameters value among C and the 8bit bus control figure video image processing module DPTV-SVP changes once its per 30 seconds;

(2) thus make the pixel of television image picture carry out per 30 seconds once moving, and determine to go round and begin again up and down moving direction by a global variable.

Wherein the concrete grammar of step (2) is:

(1) the timer initial value was made as 30 seconds, when the timer count value was kept to 0, H_start increased identical constant respectively with the H_end register value, at this moment, and each picture element level of image frame setpoint distance that moves to right; Then the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, H_start deducted identical constant respectively with the H_end register value, at this moment, and each picture element horizontal left setpoint distance of image frame;

(2) according to the method for above-mentioned (1),, realize that the vertical direction of picture pixel point moves by changing V_start and V_end register value;

(3) so go round and begin again and carry out.

Above-mentioned digital video processing module DPTV is the DPTV-SVP type of Trident company.

Fig. 1 is the functional-block diagram of TV signal of the present invention.Fig. 2 moves synoptic diagram for the capable field sync signal pixel of image of present embodiment.Present embodiment is by write-in program in host CPU, by I ²Register value among the total line traffic control DPTV-SVP of C and 8bit when TV is not in plant states or ageing state, makes the television image picture carry out in per 30 seconds once moving, and determines up and down moving direction with a global variable.Concrete pixel moving direction program is:

The direction of using global variable record pixel to move mainly is a four direction, adopts 0,1,2,3 expressions.

if(++ucDirect>3)

ucDirect＝0；

switch(ucDirect)

{

case?0:

uwTemp＝tdReadWord(_P1_00_)；

UwTemp=uwTemp+0x02; // _ P1_00_ represents main picture window displayed row start bit

Put

tdWriteWord(_P1_00_，uwTemp)；

UwTemp=tdReadWord (_ P1_02_); // _ P1_02_ represents that main picture window displayed row finishes

The position

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_02_，uwTemp)；

tdSleep(20)；

UwTemp=tdReadWord (_ P1_50_); // _ P1_50_ represents that picture-in-picture image window displayed row opens

The beginning position

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_50_，uwTemp)；

UwTemp=tdReadWord (_ P1_52_); // _ P1_52_ represents picture-in-picture image window displayed row knot

The bundle position

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_52_，uwTemp)；

tdSleep(20)；

break；

case?1:

UwTemp=tdReadWord (_ P1_04_); // _ P1_04_ represents start bit, main picture window displayed field

Put

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_04_，uwTemp)；

UwTemp=tdReadWord (_ P1_06_); // _ P1_06_ represents main picture window displayed field stop bit

Put

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_06_，uwTemp)；

tdSleep(20)；

UwTemp=tdReadWord (_ P1_54_); // _ P1_54_ represents that picture-in-picture image window displayed field opens

The beginning position

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_54_，uwTemp)；

UwTemp=tdReadWord (_ P1_56_); // _ P156_ represents picture-in-picture image window displayed field knot

The bundle position

uwTemp＝uwTemp+0x02；

tdWriteWord(_P1_56_，uwTemp)；

tdSleep(20)；

break；

case?2:

uwTemp＝tdReadWord(_P1_00_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_00_，uwTemp)；

uwTemp＝tdReadWord(_P1_02_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_02_，uwTemp)；

tdSleep(20)；

uwTemp＝tdReadWord(_P1_50_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_50_，uwTemp)uwTemp＝tdReadWord(_P1_52_)uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_52_，uwTemp)tdSleep(20)；

break；

case?3:

uwTemp＝tdReadWord(_P1_04_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_04_，uwTemp)；

uwTemp＝tdReadWord(_P1_06_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_06_，uwTemp)；

tdSleep(20)；

uwTemp＝tdReadWord(_P1_54_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_54_，uwTemp)；

uwTemp＝tdReadWord(_P1_56_)；

uwTemp＝uwTemp-0x02；

tdWriteWord(_P1_56_，uwTemp)；

tdSleep(20)；

break；

default:

break；

Embodiment 1 uses DPTV-SVP register parameters function, and only needing increases corresponding software programs, just can realize a brand-new function, does not increase cost, can protect kinescope can not burnt under highlighted fixed image, prolongs the kinescope life-span when normal the use.It can be widely used in the televisor of various types.

Claims (3)

1. the pixel moving method of a television image is characterized in that it may further comprise the steps:

Step 1, in the host CPU of televisor write-in program, pass through I ²Register parameters value among C and the 8bit bus control figure video image processing module DPTV-SVP changes once its per 30 seconds;

Thereby step 2 makes the pixel of television image picture carry out per 30 seconds once moving, and determines up and down moving direction, repeated execution of steps 2 by a global variable.

2. according to the pixel moving method of the described television image of claim 1, it is characterized in that, in said digital video processing module DPTV-SVP, include timer, H_start register, H_end register, V_start register and V_end register; The concrete grammar of said step 2 is:

Step 2-1, the timer initial value was made as 30 seconds, when the timer count value was kept to 0, the value of H_start register and H_end register all increased identical constant respectively, at this moment, and each picture element level of image frame setpoint distance that moves to right; Then the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of H_start register and H_end register all deducted identical constant respectively, at this moment, and each picture element horizontal left setpoint distance of image frame;

Step 2-2, the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of V_start register and V_end register all increased identical constant respectively, and at this moment, each picture element of image frame vertically moves down setpoint distance; And then the timer initial value is reset to 30 seconds, when the timer count value was kept to 0, the value of V_start register and V_end register all deducted identical constant respectively, at this moment, each picture element pan-up setpoint distance of image frame;

Step 2-3, return step 2-1.

3. according to the pixel moving method of claim 1 or 2 described television images, it is characterized in that said digital video processing module DPTV-SVP is the DPTV-SVP type of Trident company.

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