CN102263964A - Method and device for stably displaying mobile analog television image - Google Patents
Method and device for stably displaying mobile analog television image Download PDFInfo
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Abstract
The invention provides a method for stably displaying a mobile analog television image. After an analog television signal received by an antenna is processed by a filter, a low-noise amplifier, a zero intermediate frequency converter and an analog/digital converter, the method comprises the following steps of: A, demodulating the analog television signal subjected to analog/digital conversion to acquire a composite video broadcast signal (CVBS); B, decoding the CVBS to acquire an image signal, and extracting a line indicating signal in the image signal; detecting the CVBS to acquire a line synchronizing signal; and C, calculating a difference between the line synchronizing signal and the line indicating signal, and adjusting the line indicating signal and a content indicating signal in the image signal according to the different so as to make the adjusted positions of the line indicating signal and the line synchronizing signal consistent. The invention also provides a device for stably displaying the mobile analog television image. By the technical scheme, display offset of the analog television image can be effectively suppressed in the mobile process.
Description
Technical Field
The invention relates to the technical field of mobile analog television signals, in particular to a method and a device for stably displaying images of a mobile analog television.
Background
Analog television standards have existed for a considerable time as a mature technical standard and are widely used. The analog television receiving equipment needs to receive and process television signals transmitted by analog signal transmitters of various television stations in real time, so as to realize synchronous playing of analog television programs. The traditional analog television receiving equipment lacks a single processing chip, needs a plurality of analog processing modules such as a tuner, a demodulator, a decoder and the like, has large volume and large power consumption, and is mainly applied to household consumer appliances, namely common household color television.
With the rapid development of the CMOS technology, a solution for receiving a single chip by an analog television becomes possible, and the solution is derived from an original single analog circuit as an analog or digital-analog mixed solution, so that the volume is reduced, the power consumption is reduced, and the analog television can be applied to mobile portable devices such as mobile phones. An apparatus for receiving an analog television signal in a digital-analog hybrid manner, which is common in the prior art, can be referred to as fig. 1. The filter 102, the low noise amplifier 103, and the zero intermediate frequency converter 104 are analog processing devices, which receive an analog signal transmitted by a television station locally through the antenna 101 and convert the analog signal into a baseband signal for processing by subsequent modules. The analog-to-digital converter 105 converts the analog signal into a digital signal, and the demodulator 106, the sound decoder 109, the image decoder 110 and the clock restorer 108 are all digital processing devices, wherein the clock restorer 108 extracts the clock frequency from the signal transmitted by the television station, restores the clock signal of the transmitting end of the television station according to the clock frequency and the local clock signal generated by the local clock 107, and the restored clock signal of the transmitting end of the television station is respectively output to the analog-to-digital converter 105, the demodulator 106, the sound decoder 109 and the image decoder 110, so that the digital processing devices can adopt a clock synchronous with the television station, thereby enabling the image to be normally decoded and displayed.
This configuration is suitable for non-mobile devices. For mobile equipment, due to the effects of multipath Doppler (Doppler) and the like in the moving process and the large variation of signal-to-noise ratio (SNR), certain time delay or distortion exists in clock tracking extraction, so that the image display is unstable in the moving process, the left-right shaking problem exists, and the viewing effect is influenced.
As shown in fig. 2, the Composite Video Broadcast Signal (CVBS) is a data signal demodulated by the demodulator 106. The CVBS has a horizontal sync signal at regular intervals in the image content, which has a fixed width and height (level) and the lowest level for easy recognition by the receiver.
In the image decoder, the clock for image decoding of the CVBS is the transmission station clock recovered by the clock recoverer 108 from the local clock signal and the line synchronization signal. If the recovered transmitting station clock is consistent with the actual clock of the television station, the distance between the decoded row indication signals is fixed, and the displayed image is stable; if the clock is slower than the actual clock of the television station, the spacing between the line indicating signals decoded from the recovered transmitter station clock is wider than the spacing between the actual two adjacent line start points in the image signal. Thus, the starting point of a line in the image signal determined on the basis of the line indication signal lags behind the actual starting point of the line. The image thus displayed is left-biased. Conversely, if the clock is faster than the television station transmission clock, the decoded row indicator signal will be narrower than the actual received image signal and the displayed image will be right-skewed. If the clock has large frequency jitter due to reasons such as the fact that the analog television receiver moves, the image display will deviate from left to right, and the situation of left-right shaking occurs, so that the watching is influenced.
Disclosure of Invention
The invention provides a method and a device for stably displaying a mobile analog television image, which can effectively inhibit the display offset of the analog television image in the moving process.
The embodiment of the invention provides a method for stably displaying images of a mobile analog television, wherein analog television signals received by an antenna are processed by a filter, a low-noise amplifier, a zero intermediate frequency converter and an analog-to-digital converter in sequence and then are processed as follows:
A. demodulating the analog television signal after analog-to-digital conversion to obtain a composite video broadcast signal CVBS;
B. decoding the CVBS to obtain an image signal, and extracting a line indication signal in the image signal; detecting the CVBS to obtain a line synchronization signal;
C. and calculating a difference value between the line synchronization signal and the line indication signal, and adjusting the line indication signal and the content indication signal in the image signal according to the difference value to enable the positions of the adjusted line indication signal and the adjusted line synchronization signal to be consistent.
Preferably, before calculating the difference between the line synchronization signal and the line indication signal in step C, the method further includes: the line synchronization signal is delayed.
Preferably, the calculating the difference between the row synchronization signal and the row indication signal comprises:
c1 calculating line synchronous signal PsAnd row indication signal PiDifference between them, Δ ═ Ps-Pi；
C2, judging whether the difference value delta exceeds the preset range [ -delta ] or notMAX，ΔMAX]If the negative direction exceeds, the difference is set as
If the positive direction exceeds, setting the difference value as
If not, the difference is set as
Preferably, the adjusting the line indication signal and the content indication signal in the image signal according to the difference value is:
if the difference is
If the signal is negative, the line indication signal and the content indication signal in the image signal are adjusted to the left
If the difference is
If the signal is positive, the line indication signal and the content indication signal in the image signal are adjusted to the rightWherein,
represents the difference
Absolute value of (a).
Preferably, before the step C2, the method further includes: the difference delta is low-pass filtered.
The embodiment of the invention also provides a device for stably displaying the mobile analog television image, which comprises:
a synchronous signal detector (401) for detecting a composite video broadcast signal CVBS to obtain a horizontal synchronous signal and outputting the horizontal synchronous signal;
a synchronizing signal position comparator (403) for extracting a line indicating signal from the image signal decoded by the CVBS, calculating a difference between the line synchronizing signal and the line indicating signal, and outputting the difference to an output adjuster (406);
and the output adjuster (406) is used for adjusting the line indicating signal and the content indicating signal in the image signal according to the difference value so as to enable the position of the adjusted line indicating signal to be consistent with the position of the line synchronizing signal.
Preferably, the apparatus further comprises: and the delayer (402) is used for carrying out time delay processing on the line synchronizing signal output by the synchronizing signal detector (401) and then outputting the line synchronizing signal after the time delay processing to the synchronizing signal position comparator (403).
Preferably, the apparatus further comprises: a clamp (405);
the synchronizing signal position comparator (403) calculates a horizontal synchronizing signal PsAnd row indication signal PiDifference between them, Δ ═ Ps-PiAnd outputs the difference Δ to a clamper (405);
the clamper (405) is used for judging whether the difference value delta exceeds the preset range [ -delta [)MAX，ΔMAX]If the negative direction exceeds, the difference is set as
If the positive direction exceeds, setting the difference value as
If not, the difference is set as
And will be different
Output to the output adjuster (406).
Preferably, the apparatus further comprises: and the low-pass filter (404) is used for low-pass filtering the difference value output by the synchronizing signal position comparator (403) and outputting the filtered difference value to the clamper (405).
Preferably, the output adjuster (406) is configured to determine whether the received difference is positive or negative, and if the difference is negative, adjust the line indication signal and the content indication signal in the image signal to the left; and if the difference is positive, adjusting the line indicating signal and the content indicating signal in the image signal to the right, wherein the adjustment amplitude is equal to the absolute value of the difference.
The embodiment of the present invention further provides a device for receiving analog television signals in a digital-analog hybrid manner, including: -an antenna (101), -a filter (102), -a low noise amplifier (103), -a zero intermediate frequency converter (104), -an analog-to-digital converter (105), -a demodulator (106), and-an image decoder (110), the apparatus further comprising an image shaper (111), the image shaper (111) comprising:
a synchronization signal detector (401) for detecting a composite video broadcast signal CVBS output by the demodulator (106) to obtain a horizontal synchronization signal and outputting the horizontal synchronization signal;
a synchronizing signal position comparator (403) for extracting a line indicating signal from the image signal output from the image decoder (110), calculating a difference between the line synchronizing signal and the line indicating signal, and outputting the difference to an output adjuster (406);
and the output adjuster (406) is used for adjusting the line indicating signal and the content indicating signal in the image signal according to the difference value so as to enable the position of the adjusted line indicating signal to be consistent with the position of the line synchronizing signal.
According to the technical scheme, the deviation of the image can be corrected by calculating the difference between the line synchronization signal and the line indication signal and correspondingly adjusting the line indication signal and the content indication signal according to the difference.
Drawings
FIG. 1 is a diagram of an apparatus for receiving an analog television signal in a mixed digital-analog manner according to the prior art;
FIG. 2 is a schematic diagram of the recovered transmitter clock not being consistent with the actual clock of the TV station;
fig. 3 is a schematic diagram of an apparatus for receiving an analog television signal in a digital-analog hybrid manner according to an embodiment of the present invention;
FIG. 4 is a block diagram of the internal modules of the image shaper 111 of FIG. 3;
fig. 5 is a schematic diagram of adjusting an image according to an embodiment of the present invention.
Detailed Description
As shown in fig. 3, compared with fig. 1, the apparatus for receiving an analog television signal in a digital-analog hybrid mode according to the embodiment of the present invention adds an image shaper 111 at the back end of the image decoder 110.
A block diagram of an embodiment of the image shaper 111 is shown in fig. 4.
The CVBS is a data signal obtained after demodulation by the demodulator 106, because the horizontal synchronization signal of the CVBS has the characteristic of the lowest level value, the horizontal synchronization signal detector 401 can find the synchronization signal by searching the minimum value, which is denoted as Ps. The CVBS may be passed through by the image decoder 110 to the image shaper 111, or a signal transmission channel between the demodulator 106 and the image shaper 111 may be set, and the CVBS is directly transmitted by the decoder 106 to the image shaper 111.
The image signal is a signal decoded by the image decoder 110. The video signal comprises decoded video content and control signals (line indicator, field indicator and content indicator), wherein the line indicator is generated by the transmitting station clock recovered by the clock recoverer 108 to indicate the start of each line of the video, denoted as Pi。
The delay 402 is used to delay the sync signal P found by the line sync signal detector 401sDelaying to compensate time difference between CVBS and image signal, and recording the position of delayed synchronous signal as Psd. This module is an optional module.
The synchronizing signal position comparator 403 detects the synchronizing signalLine synchronization position P detected by device 401sd(or P)s) And a row indication signal PiComparing the two outputs, and comparing the difference output delta Psd-PiThe difference Δ may be a positive or negative number.
The low pass filter 404 is used to low pass filter the difference Δ to eliminate the effect of high frequency jumps. The low pass filter 404 is an optional block.
The clamp 405 is used to set a maximum allowable output adjustment range [ - Δ ])MAX，ΔMAX]. The clamper 405 judges whether the inputted difference value Δ exceeds the preset range [ - Δ [ ]MAX，ΔMAX]If the negative direction exceeds, the difference is set to-deltaMAXIf the positive direction exceeds, the difference is set to deltaMAXAnd if the difference value delta is not beyond the range, the value of the difference value delta is unchanged. Values that exceed this range (both positive and negative terms included) are clamped to the maximum allowable value. The allowable maximum output adjustment range may be made configurable. The difference after passing through the low-pass filter and the clamp is recorded as
The clamp 405 functions to prevent the adjustment amplitude of the row indication signal and the content indication signal from being too large, and this module is also an optional module.
The output adjuster 406 is used for adjusting the difference
The image signal is adjusted. See in particular fig. 5. The adjusted forward indication signal and the content indication signal are generated by a locally recovered transmit station clock. It can be seen that when the locally recovered transmit station clock is slower than the transmit station actual clock, the left hand case of the image occurs,the value should be negative, the line indication signal and the content indication signal should be shifted to the right with respect to the actual image signal and should be adjusted to the left
(
The value is taken as the absolute value). When the locally recovered launch pad clock occurs faster than the launch pad actual clock and the image is right-skewed,the value should be positive, the line indicating signal and the content indicating signal should be shifted to the left with respect to the actual image signal, and should be adjusted to the right
The position of the adjusted line indicating signal is consistent with that of the line synchronizing signal, and the adjusted content indicating signal can correctly indicate the actual image position, so that the image display is stable.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (11)
1. A method for stably displaying images of a mobile analog television is characterized in that analog television signals received by an antenna are processed by a filter, a low noise amplifier, a zero intermediate frequency converter and an analog-to-digital converter in sequence and then are processed as follows:
A. demodulating the analog television signal after analog-to-digital conversion to obtain a composite video broadcast signal CVBS;
B. decoding the CVBS to obtain an image signal, and extracting a line indication signal in the image signal; detecting the CVBS to obtain a line synchronization signal;
C. and calculating a difference value between the line synchronization signal and the line indication signal, and adjusting the line indication signal and the content indication signal in the image signal according to the difference value to enable the positions of the adjusted line indication signal and the adjusted line synchronization signal to be consistent.
2. The method of claim 1, wherein step C further comprises, before calculating the difference between the line synchronization signal and the line indication signal:
the line synchronization signal is delayed.
3. The method of claim 1, wherein calculating the difference between the line synchronization signal and the line indication signal comprises:
c1 calculating line synchronous signal PsAnd row indication signal PiDifference between them, Δ ═ Ps-Pi；
C2, judging whether the difference value delta exceeds the preset range [ -delta ] or notMAX，ΔMAX]If the negative direction exceeds, the difference is set as
If the positive direction exceeds, setting the difference value as
If not, the difference is set as
4. The method of claim 3, wherein the adjusting the line indication signal and the content indication signal in the image signal according to the difference value is: if the difference is
Negative, then the image signalLeft justification of line indication signals and content indication signals
If the difference is
If the signal is positive, the line indication signal and the content indication signal in the image signal are adjusted to the right
Wherein,
represents the difference
Absolute value of (a).
5. The method according to claim 3, wherein before the step C2, the method further comprises: the difference delta is low-pass filtered.
6. An apparatus for moving a stable display of an analog television image, the apparatus comprising:
a synchronous signal detector (401) for detecting a composite video broadcast signal CVBS to obtain a horizontal synchronous signal and outputting the horizontal synchronous signal;
a synchronizing signal position comparator (403) for extracting a line indicating signal from the image signal decoded by the CVBS, calculating a difference between the line synchronizing signal and the line indicating signal, and outputting the difference to an output adjuster (406);
and the output adjuster (406) is used for adjusting the line indicating signal and the content indicating signal in the image signal according to the difference value so as to enable the position of the adjusted line indicating signal to be consistent with the position of the line synchronizing signal.
7. The apparatus of claim 6, further comprising: and the delayer (402) is used for carrying out time delay processing on the line synchronizing signal output by the synchronizing signal detector (401) and then outputting the line synchronizing signal after the time delay processing to the synchronizing signal position comparator (403).
8. The apparatus of claim 6, further comprising: a clamp (405);
the synchronizing signal position comparator (403) calculates a horizontal synchronizing signal PsAnd row indication signal PiDifference between them, Δ ═ Ps-PiAnd outputs the difference Δ to a clamper (405);
the clamper (405) is used for judging whether the difference value delta exceeds the preset range [ -delta [)MAX，ΔMAX]If the negative direction exceeds, the difference is set as
If the positive direction exceeds, setting the difference value asIf not, the difference is set as
And will be different
Output to the output adjuster (406).
9. The apparatus of claim 8, further comprising: and the low-pass filter (404) is used for low-pass filtering the difference value output by the synchronizing signal position comparator (403) and outputting the filtered difference value to the clamper (405).
10. The apparatus of claim 9, wherein said output adjuster (406) is configured to determine whether the received difference is positive or negative, and if the difference is negative, adjust the line indication signal and the content indication signal in the image signal to the left; and if the difference is positive, adjusting the line indicating signal and the content indicating signal in the image signal to the right, wherein the adjustment amplitude is equal to the absolute value of the difference.
11. An apparatus for receiving analog television signals in a digital-analog hybrid manner, comprising: -an antenna (101), -a filter (102), -a low noise amplifier (103), -a zero intermediate frequency converter (104), -an analog-to-digital converter (105), -a demodulator (106), and-an image decoder (110), characterized in that the apparatus further comprises an image shaper (111), the image shaper (111) comprising:
a synchronization signal detector (401) for detecting a composite video broadcast signal CVBS output by the demodulator (106) to obtain a horizontal synchronization signal and outputting the horizontal synchronization signal;
a synchronizing signal position comparator (403) for extracting a line indicating signal from the image signal output from the image decoder (110), calculating a difference between the line synchronizing signal and the line indicating signal, and outputting the difference to an output adjuster (406);
and the output adjuster (406) is used for adjusting the line indicating signal and the content indicating signal in the image signal according to the difference value so as to enable the position of the adjusted line indicating signal to be consistent with the position of the line synchronizing signal.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301582A (en) * | 2013-11-29 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Composite video signal generating method |
| WO2016078262A1 (en) * | 2014-11-19 | 2016-05-26 | 深圳市中兴微电子技术有限公司 | Measurement method and apparatus for composite video broadcast signal quality and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220413A (en) * | 1990-06-20 | 1993-06-15 | Samsung Electronics Co. Ltd. | Device for a compatible luminance/chrominance separation between different standard video signals |
| CN1158869C (en) * | 2001-09-21 | 2004-07-21 | 四川长虹电器股份有限公司 | Separator of HDTV line synchronization signal |
| JP2005252688A (en) * | 2004-03-04 | 2005-09-15 | Nec Corp | Composite analog/component digital image signal converter and conversion method, and subcarrier generating circuit used for it, and luminance/color signal generating circuit |
| CN100456822C (en) * | 2005-10-31 | 2009-01-28 | 三星电子株式会社 | Video signal receiver including display synchronizing signal generation device and control method thereof |
-
2010
- 2010-05-31 CN CN201010194913.3A patent/CN102263964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5220413A (en) * | 1990-06-20 | 1993-06-15 | Samsung Electronics Co. Ltd. | Device for a compatible luminance/chrominance separation between different standard video signals |
| CN1158869C (en) * | 2001-09-21 | 2004-07-21 | 四川长虹电器股份有限公司 | Separator of HDTV line synchronization signal |
| JP2005252688A (en) * | 2004-03-04 | 2005-09-15 | Nec Corp | Composite analog/component digital image signal converter and conversion method, and subcarrier generating circuit used for it, and luminance/color signal generating circuit |
| CN100456822C (en) * | 2005-10-31 | 2009-01-28 | 三星电子株式会社 | Video signal receiver including display synchronizing signal generation device and control method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104301582A (en) * | 2013-11-29 | 2015-01-21 | 中国航空工业集团公司洛阳电光设备研究所 | Composite video signal generating method |
| WO2016078262A1 (en) * | 2014-11-19 | 2016-05-26 | 深圳市中兴微电子技术有限公司 | Measurement method and apparatus for composite video broadcast signal quality and storage medium |
| CN105681780A (en) * | 2014-11-19 | 2016-06-15 | 深圳市中兴微电子技术有限公司 | Method and apparatus for measuring quality of composite video broadcast signal |
| CN105681780B (en) * | 2014-11-19 | 2018-06-15 | 深圳市中兴微电子技术有限公司 | A kind of measuring method and device of Composite Video Baseband Signal quality |
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