CN102196294A - Signal processing method for stereoscopic television and stereoscopic television - Google Patents
Signal processing method for stereoscopic television and stereoscopic television Download PDFInfo
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- CN102196294A CN102196294A CN2010101266911A CN201010126691A CN102196294A CN 102196294 A CN102196294 A CN 102196294A CN 2010101266911 A CN2010101266911 A CN 2010101266911A CN 201010126691 A CN201010126691 A CN 201010126691A CN 102196294 A CN102196294 A CN 102196294A
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Abstract
The invention discloses a signal processing method for a stereoscopic television. The method comprises the following steps of: acquiring brightness and chromatic aberration (YUV) signals of the stereoscopic television; performing subarea brightness adjustment on the YUV signals according to the subareas of a preset liquid crystal panel, and controlling the backlight of the stereoscopic television according to the adjusted brightness of each area; and performing brightness compensation of the YUV signals after the subarea brightness adjustment, and converting the brightness compensated YUV signals into red, green and blue (RGB) video signals, and outputting the RGB video signals to the liquid crystal panel. Correspondingly, the invention also discloses the stereoscopic television. By the method, the contrast of pictures can be improved, the stereoscopic reality sense can be enhanced, the user experience can be promoted, meanwhile, the power consumption of the stereoscopic television can be reduced, and the purpose of saving energy is fulfilled.
Description
Technical field
The present invention relates to technical field of television sets, relate in particular to the signal processing method and the stereoscopic TV of stereoscopic TV.
Background technology
Along with the development of television technologies, stereoscopic TV has entered people's life gradually.What stereoscopic TV (being three-dimensional television again) transmitted is the image information of double vision point, people are when watching object, absorb the image of an object simultaneously with two glasses, form two viewpoints, about the parallax of the image that forms in two have any different, people's brain promptly melts the degree of depth and the distance that picture goes out object according to the difference of parallax, forms 3-D view.
RGB (Red Green Brue, the RGB color mode), be to obtain color miscellaneous by variation and their stacks each other to three Color Channels of red, green, blue, it is a color standard of industrial quarters, almost comprised human eyesight can perception all colours, be widely used in the color TV field.YUV (a kind of colour coding method or claim a kind of color space, Y represents brightness, UV represents aberration, U and V constitute two colored components), be mainly used in the transmission of optimizing colour-video signal (as: RGB), to solve the compatible problem of color television set and black and white television set, compare with the rgb video signal transmission, YUV signal only need take few frequency range (RGB require three independently vision signal transmit simultaneously, and YUV sends brightness signal Y and two color difference signal U and V by same channel), therefore, stereoscopic TV generally need be converted to YUV signal with rgb video signal and transmits.
Stereoscopic TV is generally LCDs, LCDs is passive display screen, liquid crystal itself is not luminous, so LCDs needs module backlight that light source is provided, wherein, LED (Light Emitting Diode, light-emitting diode) module backlight is good owing to its color reducibility, brightness height, power saving, be easy to carry out advantages such as subregion control, become the main flow backlight of LCDs.
Existing stereoscopic TV can adopt designs such as time division type, polarised light formula, adopts the LED-backlit source.The inventor finds that mainly there is following defective in the design of existing stereoscopic TV in implementing process of the present invention:
1, the three-dimensional sense of reality of picture is not strong.Existing stereoscopic TV is when playing, and its backlight directly keeps normal bright state, and its backlight switch can not match with picture, causes the picture hangover obviously, and the three-dimensional sense of reality is not strong;
2, power consumption height, contrast is low.Existing stereoscopic TV is when playing, and the overall brightness unanimity of its backlight can not the subregion light modulation, cause the power consumption height of TV, and the contrast of image is lower.
Summary of the invention
The objective of the invention is to, a kind of signal processing method and stereoscopic TV of stereoscopic TV is provided, can improve the contrast of picture, strengthen the three-dimensional sense of reality, promote user experience, can reduce the power consumption of stereoscopic TV simultaneously, reach purpose of energy saving.
To achieve these goals, the embodiment of the invention provides a kind of signal processing method of stereoscopic TV, comprising:
Obtain the YUV signal of stereoscopic TV;
Subregion according to default liquid crystal panel carries out subregion brightness adjustment to described YUV signal, and according to adjusted each regional brightness, controls the backlight of described stereoscopic TV;
YUV signal after the described subregion brightness adjustment is carried out luminance compensation, the YUV signal behind the luminance compensation is converted to rgb video signal and exports described liquid crystal panel.
Correspondingly, the embodiment of the invention also provides a kind of stereoscopic TV, comprising:
Acquisition module is used to obtain the YUV signal of stereoscopic TV;
Subregion brightness adjusting module is used for the subregion according to default liquid crystal panel, and the described YUV signal that described acquisition module obtains is carried out subregion brightness adjustment;
Backlight control module is used for controlling the backlight of described stereoscopic TV according to adjusted each the regional brightness of described subregion brightness adjusting module;
The luminance compensation module is used for the adjusted YUV signal of described subregion brightness adjusting module is carried out luminance compensation;
Modular converter is used for the YUV after the described luminance compensation module for compensating is converted to rgb video signal;
The video output module is used to export the rgb video signal that described modular converter is converted to.
The present invention is by the subregion according to default liquid crystal panel, the YUV signal of stereoscopic TV is carried out subregion brightness adjustment, and according to adjusted each regional luminance of subregion, control the backlight of stereoscopic TV, backlight and the picture signal of stereoscopic TV is cooperated, eliminate the liquid crystal hangover, improved the three-dimensional sense of reality, promoted user experience; Since to stereoscopic TV backlight according to liquid crystal panel each regional brightness control, each distinguishes brightness and not quite identical, has improved picture contrast; Simultaneously, the subregion light modulation makes each distinguish the demonstration of carrying out brightness according to the picture needs of reality, and the power consumption of whole stereoscopic TV is reduced, and reaches purpose of energy saving.
Description of drawings
The structural representation of the embodiment of the stereoscopic TV that Fig. 1 provides for the embodiment of the invention;
The structural representation of the embodiment of the acquisition module 10 that Fig. 2 provides for the embodiment of the invention;
The structural representation of the embodiment of the subregion brightness adjusting module 20 that Fig. 3 provides for the embodiment of the invention;
The structural representation of the embodiment of the luminance compensation module 40 that Fig. 4 provides for the embodiment of the invention;
The flow chart of first embodiment of the signal processing method of the stereoscopic TV that Fig. 5 provides for the embodiment of the invention;
The flow chart of second embodiment of the signal processing method of the stereoscopic TV that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Because there is defective in the design of existing stereoscopic TV, the present invention has had certain improvement to the design of stereoscopic TV, its can based on but be not limited to FPGA (Field Programmable Gate Array, field programmable gate array), ASIC (Application Specific Integrated Circuit, application-specific integrated circuit (ASIC)) etc. design, except that specifying, the stereoscopic TV of the embodiment of the invention is based on that FPGA designs.
See also Fig. 1, the structural representation of the embodiment of the stereoscopic TV that provides for the embodiment of the invention; Described stereoscopic TV comprises: acquisition module 10, subregion brightness adjusting module 20, backlight control module 30, luminance compensation module 40, modular converter 50 and video output module 60.
Described acquisition module 10 is used to obtain the YUV signal of stereoscopic TV;
In the specific implementation, the described acquisition module 10 of stereoscopic TV is by LVDS (Low-VoltageDifferential Signaling, Low Voltage Differential Signal) mainboard from spatical television set obtains picture material (original rgb video signal), because the every road of LVDS speed is higher, therefore, stereoscopic TV at first needs it to be gone here and there and change and reduce its speed, then with RGB by matrixing and respective coding, be converted to YUV signal, particularly, described rgb signal and YUV signal be converted to prior art mutually, do not give unnecessary details at this.
Described subregion brightness adjusting module 20 is used for the subregion according to default liquid crystal panel, and the described YUV signal that described acquisition module 10 obtains is carried out subregion brightness adjustment;
In the specific implementation, the YUV signal that described acquisition module 10 obtains is transferred to subregion brightness adjusting module 20, described subregion brightness adjusting module 20 is at first according to the subregion of default liquid crystal panel, YUV signal is decomposed into and the corresponding subregion YUV signal of each subregion, and promptly each subregion is to regard to the YUV signal after the decomposition; Secondly, described subregion brightness adjusting module 20 comes out the brightness signal extraction in the YUV signal in each subregion, and calculate this luminance signal in each regional maximum and minimum value, its computational methods mainly are each pixels that extracts in the zone, luminance signal on each pixel is calculated, obtain the brightness value on each pixel respectively, compare each brightness value then, therefrom obtain the maximum and the minimum value of luminance signal; Once more, described subregion brightness adjusting module 20 is determined each regional brightness on the liquid crystal panel according to the maximum and the minimum value that calculate.
Described backlight control module 30 is used for controlling the backlight of described stereoscopic TV according to described subregion brightness adjusting module 20 adjusted each regional brightness;
In the specific implementation, each regional brightness of liquid crystal panel that described backlight control module 30 is determined according to described subregion brightness adjusting module 20 utilizes the LED-backlit of stereoscopic TV to drive, and controls stereoscopic TV backlight on liquid crystal panel; Because the backlight illumination of stereoscopic TV is to control according to the luminance signal in the vision signal, therefore, it is backlight to cooperate synchronously with picture signal, that is: when display frame, and backlight opening; Promptly close backlightly when this frame picture shows to finish, like this, can eliminate the liquid crystal hangover, improve the three-dimensional sense of reality; In addition, its stereoscopic TV adopts the subregion light modulation, has avoided the overall brightness unanimity as existing stereo TV scheme, has reduced the stereoscopic TV power consumption.
Described luminance compensation module 40 is used for described subregion brightness adjusting module 30 adjusted YUV signal are carried out luminance compensation;
In the specific implementation, because behind the YUV signal process subregion brightness adjusting module 20, adjustment backlight can weaken the backlight illumination in the liquid crystal panel zone to liquid crystal panel employing subregion, therefore, in order to guarantee image quality, need be to carrying out luminance compensation through the adjusted YUV signal of subregion brightness, this compensation is undertaken by described luminance compensation module 40.Described luminance compensation module 40 is at first carried out luminance compensation to each regional luminance signal of liquid crystal panel, the mode of this compensation can for: adjust each regional luminance signal (Y-signal) value.Particularly, because signal exists with the numerical value form in FPGA, described luminance compensation module 40 is promptly revised the value of the luminance signal among the described FPGA, such as: brightness signal value can be revised as 2 by 1, promptly realize compensation luminance signal.
In the specific implementation, relation according to luminance signal in the YUV signal and rgb video signal: Y=0.299R+0.587G+0.114B, therefore, by adjusting the Y-signal in the YUV signal, be the corresponding rgb video signal of having adjusted, and then adjusted the deflection angle of liquid crystal molecule in the liquid crystal panel.Such as: the darkest point is 50% in certain zone, promptly this regional luminance minimum value is 50%, after the described subregion brightness adjusting module 20 of process carries out adjustment backlight to this zone, make this regional luminance minimum value be reduced to 30%, the rgb signal of this each pixel of zone all heightens 20%, three signals supposing initial rgb video signal are respectively 128,128,128, be converted to YUV signal carry out subregion backlight after, its brightness deterioration, described luminance compensation module 40 is revised these regional brightness signal values, make its corresponding rgb video signal be adjusted into 154, like this, rgb video signal when the liquid crystal panel, when liquid crystal molecule is initial relatively deflection more perspective, the light that sees through on the liquid crystal panel is more, and the brightness of liquid crystal panel output is just consistent with subregion preceding brightness backlight like this.
Secondly, each the regional luminance signal after described luminance compensation module 40 will compensate is reintegrated in the YUV signal, transmits as a complete YUV signal.Because after subregion brightness is adjusted, the power consumption of stereoscopic TV has reduced, its inner luminance signal is also corresponding have been weakened, but after the described luminance compensation module 40 of process is carried out corresponding compensation, the television image that makes stereoscopic TV present to people does not change to some extent because of the reduction of stereoscopic TV power consumption and weakening of brightness, has improved the performance of stereoscopic TV.
Described modular converter 50 is used for the YUV after described luminance compensation module 40 compensation is converted to rgb video signal;
In the specific implementation, described modular converter 50 is contrary with process and the acquisition module 10 that YUV signal is converted to rgb video signal with the process that rgb video signal is converted to YUV signal, be that described modular converter 50 at first is converted to rgb video signal with YUV signal, and then carry out and go here and there conversion.
Described video output module 60 is used to export the rgb video signal that described modular converter 50 is converted to.
In the specific implementation, the rgb video signal that described video output module 60 is converted to described modular converter 50 outputs to liquid crystal panel by LVDS and presents to the user.
See also Fig. 1 again, described stereoscopic TV also comprises: presetting module 70 and synchronization module 80.
Described presetting module 70 is used in advance the liquid crystal panel of described stereoscopic TV is carried out subregion.
In the specific implementation, described presetting module 70 is carried out subregion to the liquid crystal panel of stereoscopic TV in advance, its to liquid crystal panel subregional quantity can be specifically according to the size of liquid crystal panel, requirement to three-dimensional energy saving television, and the operational capability of FPGA is taken all factors into consideration, usually, many more to the liquid crystal panel subregion, also just energy-conservation more, but because FPGA need calculate the value of the luminance signal in each zone, therefore, when subregion more for a long time, its requirement to the operational capability of FPGA is also higher relatively, and its cost is also higher relatively.Therefore, described presetting module 70 need be taken all factors into consideration the factor of each side according to actual conditions, determines the only number of partitions.
Described synchronization module 80 extracts synchronizing signal from the YUV signal that described acquisition module 10 obtains, described synchronizing signal is converted to the synchronizing signal of anaglyph spectacles, and the synchronizing signal after the described conversion is sent to described anaglyph spectacles.
In the specific implementation, described synchronization module 80 at first extracts synchronizing signal from YUV signal, the synchronizing signal that needs then to extract is converted to the synchronizing signal of the anaglyph spectacles that is complementary with it, by infrared or RF (Radio Frequency, radio frequency) this synchronizing signal is sent to anaglyph spectacles, so that described anaglyph spectacles is according to this synchronizing signal switching right and left eye video signal.
The present invention is by the subregion according to default liquid crystal panel, the YUV signal of stereoscopic TV is carried out subregion brightness adjustment, and according to adjusted each regional luminance of subregion, control the backlight of stereoscopic TV, backlight and the picture signal of stereoscopic TV is cooperated, eliminate the liquid crystal hangover, improved the three-dimensional sense of reality, promoted user experience; Since to stereoscopic TV backlight according to liquid crystal panel each regional brightness control, each distinguishes brightness and not quite identical, has improved picture contrast; Simultaneously, the subregion light modulation makes each distinguish the demonstration of carrying out brightness according to the picture needs of reality, and the power consumption of whole stereoscopic TV is reduced, and reaches purpose of energy saving.
For clearer explanation the present invention, will each module of stereoscopic TV of the present invention be described in detail below.
See also Fig. 2, the structural representation of the embodiment of the acquisition module 10 that provides for the embodiment of the invention; Described acquisition module 10 comprises: acquiring unit 101 and converting unit 102.
Described acquiring unit 101 is used for obtaining original rgb video signal from the stereoscopic TV mainboard;
In the specific implementation, the described acquiring unit of stereoscopic TV 101 obtains picture material (original rgb video signal) by LVDS (Low-VoltageDifferential Signaling, Low Voltage Differential Signal) from the mainboard of spatical television set.
Described converting unit 102 is used for the original rgb video signal that described acquiring unit obtains is changed, and obtains YUV signal.
In the specific implementation, because the every road of LVDS speed is higher, therefore, described converting unit 102 at first needs the signal that described acquiring unit 101 obtains to be gone here and there and change and reduce its speed, then with rgb video signal by matrixing and respective coding, be converted to YUV signal, particularly, described rgb signal and YUV signal be converted to prior art mutually, do not give unnecessary details at this.
See also Fig. 3, the structural representation of the embodiment of the subregion brightness adjusting module 20 that provides for the embodiment of the invention; Described subregion brightness adjusting module 20 comprises: resolving cell 201, extraction unit 202, computing unit 203 and brightness determining unit 204.
Described resolving cell 201 is used for the subregion according to default liquid crystal panel, and described YUV signal is resolved into and the corresponding subregion YUV signal of described subregion;
In the specific implementation, described resolving cell 201 is decomposed into YUV signal and the corresponding subregion YUV signal of each subregion according to the subregion of default liquid crystal panel, and promptly each subregion is to regard to the YUV signal after the decomposition;
Described extraction unit 202 is used for extracting luminance signal from the subregion YUV signal that described resolving cell 201 obtains;
Described computing unit 203 is used to calculate luminance signal that described extraction unit 202 extracted in each regional maximum and minimum value;
In the specific implementation, the value calculating method of 203 pairs of each regional luminance signals of described computing unit mainly is: extract each pixel in the zone, luminance signal on each pixel is calculated, obtain the brightness value on each pixel respectively, compare each brightness value then, therefrom obtain the maximum and the minimum value of luminance signal;
Described brightness determining unit 204 is used for calculating according to described computing unit 203 maximum and the minimum value of each regional luminance signal, determines described each regional brightness.
See also Fig. 4, the structural representation of the embodiment of the luminance compensation module 40 that provides for the embodiment of the invention; Described luminance compensation module 40 comprises: luminance compensation unit 401 and integral unit 402.
Described luminance compensation unit 401 is used for described subregion brightness adjusting module 20 adjusted each regional luminance signal are carried out luminance compensation;
In the specific implementation, because behind the YUV signal process subregion brightness adjusting module 20, adjustment backlight can weaken the backlight illumination in the liquid crystal panel zone to liquid crystal panel employing subregion, therefore, in order to guarantee image quality, need be to carrying out luminance compensation through the adjusted YUV signal of subregion brightness, this compensation is undertaken by described luminance compensation unit 401.Described luminance compensation unit 401 is carried out luminance compensation to each regional luminance signal of liquid crystal panel, the mode of this compensation can for: adjust each regional luminance signal (Y-signal) value.Particularly, because signal exists with the numerical value form in FPGA, described luminance compensation unit 401 is promptly revised the value of the luminance signal among the described FPGA, such as: brightness signal value can be revised as 2 by 1, promptly realize compensation luminance signal.
In the specific implementation, relation according to luminance signal in the YUV signal and rgb video signal: Y=0.299R+0.587G+0.114B, therefore, by adjusting the Y-signal in the YUV signal, be the corresponding rgb video signal of having adjusted, and then adjusted the deflection angle of liquid crystal molecule in the liquid crystal panel.Such as: the darkest point is 50% in certain zone, promptly this regional luminance minimum value is 50%, after the described subregion brightness adjusting module 20 of process carries out adjustment backlight to this zone, make this regional luminance minimum value be reduced to 30%, the rgb signal of this each pixel of zone all heightens 20%, suppose in the initial rgb video signal, three signals are respectively 128,128,128, its be converted to YUV signal carry out subregion backlight after, its brightness deterioration, described luminance compensation unit 401 is revised this regional brightness signal value, makes its corresponding rgb video signal be adjusted into 154, like this, when rgb video signal passes through liquid crystal panel, when liquid crystal molecule is initial relatively deflection more perspective, the light that sees through on the liquid crystal panel is more, the brightness of liquid crystal panel output is just consistent with subregion preceding brightness backlight like this.
Described integral unit 402 is used for each the regional luminance signal after described luminance compensation unit 401 compensation is incorporated into described YUV signal.
In the specific implementation, each the regional luminance signal after described integral unit 402 will compensate is reintegrated in the YUV signal, transmits as a complete YUV signal.
After subregion brightness of the present invention is adjusted, the power consumption of stereoscopic TV has reduced, its inner luminance signal is also corresponding have been weakened, but after luminance signal carried out corresponding compensation, the television image that makes stereoscopic TV present to people does not change to some extent because of the reduction of stereoscopic TV power consumption and weakening of brightness, has improved the performance of stereoscopic TV.
For clearer explanation the present invention, will the signal processing method of stereoscopic TV be described in detail below.
See also Fig. 5, the flow chart of first embodiment of the signal processing method of the stereoscopic TV that provides for the embodiment of the invention; Described method comprises:
S101 obtains the YUV signal of stereoscopic TV;
In the specific implementation, S101 is by LVDS (Low-Voltage Differential Signaling, Low Voltage Differential Signal) mainboard from spatical television set obtains picture material (original rgb video signal), because the every road of LVDS speed is higher, therefore, stereoscopic TV at first needs it to be gone here and there and change and reduce its speed, then with RGB by matrixing and respective coding, be converted to YUV signal, particularly, described rgb signal and YUV signal be converted to prior art mutually, do not give unnecessary details at this.
S102, the subregion according to default liquid crystal panel carries out subregion brightness adjustment to described YUV signal, and according to adjusted each regional brightness, controls the backlight of described stereoscopic TV;
In the specific implementation, S102 at first according to the subregion of default liquid crystal panel, is decomposed into YUV signal and the corresponding subregion YUV signal of each subregion, and promptly each subregion is to regard to the YUV signal after the decomposition; Secondly, brightness signal extraction in the YUV signal in each subregion is come out, and calculate this luminance signal in each regional maximum and minimum value, its computational methods mainly are each pixels that extracts in the zone, luminance signal on each pixel is calculated, obtain the brightness value on each pixel respectively, compare each brightness value then, therefrom obtain the maximum and the minimum value of luminance signal; Once more, according to maximum that calculates and minimum value, determine each regional brightness on the liquid crystal panel; At last, according to each regional brightness of adjusted liquid crystal panel, control the backlight of stereoscopic TV; Because the backlight illumination of stereoscopic TV is to control according to the luminance signal in the vision signal, therefore, it is backlight to cooperate synchronously with picture signal, that is: when display frame, and backlight opening; Promptly close backlightly when this frame picture shows to finish, like this, can eliminate the liquid crystal hangover, improve the three-dimensional sense of reality; In addition, its stereoscopic TV adopts the subregion light modulation, has avoided the overall brightness unanimity as existing stereo TV scheme, has reduced the stereoscopic TV power consumption.
S103 carries out luminance compensation to YUV signal after the described subregion brightness adjustment, and the YUV signal behind the luminance compensation is converted to rgb video signal and exports described liquid crystal panel.
In the specific implementation, owing to after the YUV signal process subregion brightness adjustment, can weaken the backlight illumination in the liquid crystal panel zone, therefore, in order to guarantee image quality, need be to carrying out luminance compensation through the adjusted YUV signal of subregion brightness, this compensation is undertaken by S103.S103 at first carries out luminance compensation to each regional luminance signal of liquid crystal panel, the mode of this compensation can for: adjust each regional luminance signal (Y-signal) value.Particularly, because signal exists with the numerical value form in FPGA, described luminance compensation module 40 is promptly revised the value of the luminance signal among the described FPGA, such as: brightness signal value can be revised as 2 by 1, promptly realize compensation luminance signal.
In the specific implementation, relation according to luminance signal in the YUV signal and rgb video signal: Y=0.299R+0.587G+0.114B, therefore, by adjusting the Y-signal in the YUV signal, be the corresponding rgb video signal of having adjusted, and then adjusted the deflection angle of liquid crystal molecule in the liquid crystal panel.Such as: the darkest point is 50% in certain zone, promptly this regional luminance minimum value is 50%, after the described subregion brightness adjusting module 20 of process carries out adjustment backlight to this zone, make this regional luminance minimum value be reduced to 30%, the rgb signal of this each pixel of zone all heightens 20%, suppose in the initial rgb video signal, three signals are respectively 128,128,128, its be converted to YUV signal carry out subregion backlight after, its brightness deterioration, described luminance compensation module 40 is revised this regional brightness signal value, makes its corresponding rgb video signal be adjusted into 154, like this, when rgb video signal passes through liquid crystal panel, when liquid crystal molecule is initial relatively deflection more perspective, the light that sees through on the liquid crystal panel is more, the brightness of liquid crystal panel output is just consistent with subregion preceding brightness backlight like this.
Secondly, each the regional luminance signal after the compensation is reintegrated in the YUV signal, transmitted as a complete YUV signal.Because after subregion brightness is adjusted, the power consumption of stereoscopic TV has reduced, its inner luminance signal is also corresponding have been weakened, but after the above-mentioned compensation, the television image that makes stereoscopic TV present to people does not change to some extent because of the reduction of stereoscopic TV power consumption and weakening of brightness, has improved the performance of stereoscopic TV.At last, S103 is converted to YUV signal rgb video signal and exports described liquid crystal panel.
The present invention is by the subregion according to default liquid crystal panel, the YUV signal of stereoscopic TV is carried out subregion brightness adjustment, and according to adjusted each regional luminance of subregion, control the backlight of stereoscopic TV, backlight and the picture signal of stereoscopic TV is cooperated, eliminate the liquid crystal hangover, improved the three-dimensional sense of reality, promoted user experience; Since to stereoscopic TV backlight according to liquid crystal panel each regional brightness control, each distinguishes brightness and not quite identical, has improved picture contrast; Simultaneously, the subregion light modulation makes each distinguish the demonstration of carrying out brightness according to the picture needs of reality, and the power consumption of whole stereoscopic TV is reduced, and reaches purpose of energy saving.
See also Fig. 6, the flow chart of second embodiment of the signal processing method of the stereoscopic TV that provides for the embodiment of the invention.Described method comprises:
S201, the liquid crystal panel to stereoscopic TV carries out subregion in advance;
In the specific implementation, S201 carries out subregion to the liquid crystal panel of stereoscopic TV in advance, its to liquid crystal panel subregional quantity can be specifically according to the size of liquid crystal panel, requirement to three-dimensional energy saving television, and the operational capability of FPGA is taken all factors into consideration, usually, many more to the liquid crystal panel subregion, also just energy-conservation more, but because FPGA need calculate the value of the luminance signal in each zone, therefore, when subregion more for a long time, its requirement to the operational capability of FPGA is also higher relatively, and its cost is also higher relatively.Therefore, need take all factors into consideration the factor of each side, determine the only number of partitions according to actual conditions.
S202 obtains original rgb video signal from the stereoscopic TV mainboard;
S203 changes described original rgb video signal, obtains YUV signal;
S204, the subregion according to default liquid crystal panel resolves into described YUV signal and the corresponding subregion YUV signal of described subregion;
S205 extracts luminance signal from described subregion YUV signal, calculate described luminance signal in each regional maximum and minimum value;
S206 according to the maximum and the minimum value of described each regional luminance signal, determines described each regional brightness;
S207 according to described adjusted each regional brightness, controls the backlight of described stereoscopic TV;
S208 compensates described each regional luminance signal, and described each the regional luminance signal after will compensating is incorporated in the described YUV signal;
S209 is converted to rgb video signal output liquid crystal panel with described YUV signal.
In the specific implementation, also comprise step after the described step S203:
S210 extracts synchronizing signal from described YUV signal, described synchronizing signal is converted to the synchronizing signal of anaglyph spectacles, and the synchronizing signal after the described conversion is sent to described anaglyph spectacles.
In the specific implementation, S210 at first extracts synchronizing signal from YUV signal, the synchronizing signal that needs then to extract is converted to the synchronizing signal of the anaglyph spectacles that is complementary with it, by infrared or RF (RadioFrequency, radio frequency) this synchronizing signal is sent to anaglyph spectacles, so that described anaglyph spectacles is according to this synchronizing signal switching right and left eye video signal.
Description by the various embodiments described above, the present invention is by the subregion according to default liquid crystal panel, the YUV signal of stereoscopic TV is carried out subregion brightness adjustment, and according to adjusted each regional luminance of subregion, control the backlight of stereoscopic TV, the backlight and picture signal of stereoscopic TV is cooperated, eliminated the liquid crystal hangover, improve the three-dimensional sense of reality, promoted user experience; Since to stereoscopic TV backlight according to liquid crystal panel each regional brightness control, each distinguishes brightness and not quite identical, has improved picture contrast; Simultaneously, the subregion light modulation makes each distinguish the demonstration of carrying out brightness according to the picture needs of reality, and the power consumption of whole stereoscopic TV is reduced, and reaches purpose of energy saving.
Above disclosed only is a kind of preferred embodiment of the present invention, certainly can not limit the present invention's interest field with this, one of ordinary skill in the art will appreciate that all or part of flow process that realizes the foregoing description, and, still belong to the scope that invention is contained according to the equivalent variations that claim of the present invention is done.
Claims (12)
1. the signal processing method of a stereoscopic TV is characterized in that:
Obtain the YUV signal of stereoscopic TV;
Subregion according to default liquid crystal panel carries out subregion brightness adjustment to described YUV signal, and according to adjusted each regional brightness, controls the backlight of described stereoscopic TV;
YUV signal after the described subregion brightness adjustment is carried out luminance compensation, the YUV signal behind the luminance compensation is converted to rgb video signal and exports described liquid crystal panel.
2. the method for claim 1 is characterized in that, the subregion of the liquid crystal panel that described basis is default carries out subregion brightness adjustment to described YUV signal, comprising:
Subregion according to default liquid crystal panel resolves into described YUV signal and the corresponding subregion YUV signal of described subregion;
From described subregion YUV signal, extract luminance signal, calculate described luminance signal in each regional maximum and minimum value;
According to described each regional luminance signal maximum and minimum value, determine described each regional brightness.
3. method as claimed in claim 2 is characterized in that, described YUV signal after the described subregion brightness adjustment is carried out luminance compensation, comprising:
Described each regional luminance signal is carried out luminance compensation;
Described each regional luminance signal after the compensation is incorporated in the described YUV signal.
4. method as claimed in claim 3 is characterized in that, the described YUV signal of obtaining stereoscopic TV comprises:
Obtain original rgb video signal from the stereoscopic TV mainboard;
Described original rgb video signal is changed, obtained YUV signal.
5. as the described method of claim 1-4, it is characterized in that, before the described YUV signal of obtaining stereoscopic TV, also comprise:
Liquid crystal panel to described stereoscopic TV carries out subregion in advance.
6. method as claimed in claim 5 is characterized in that, after the described YUV signal of obtaining stereoscopic TV, also comprises:
From described YUV signal, extract synchronizing signal, described synchronizing signal is converted to the synchronizing signal of anaglyph spectacles, and the synchronizing signal after the described conversion is sent to described anaglyph spectacles.
7. a stereoscopic TV is characterized in that, comprising:
Acquisition module is used to obtain the YUV signal of stereoscopic TV;
Subregion brightness adjusting module is used for the subregion according to default liquid crystal panel, and the described YUV signal that described acquisition module obtains is carried out subregion brightness adjustment;
Backlight control module is used for controlling the backlight of described stereoscopic TV according to adjusted each the regional brightness of described subregion brightness adjusting module;
The luminance compensation module is used for the adjusted YUV signal of described subregion brightness adjusting module is carried out luminance compensation;
Modular converter is used for the YUV after the described luminance compensation module for compensating is converted to rgb video signal;
The video output module is used to export the rgb video signal that described modular converter is converted to.
8. stereoscopic TV as claimed in claim 7 is characterized in that, described subregion brightness adjusting module comprises:
Resolving cell is used for the subregion according to default liquid crystal panel, and described YUV signal is resolved into and the corresponding subregion YUV signal of described subregion;
Extraction unit is used for extracting luminance signal from the subregion YUV signal that described resolving cell obtains;
Computing unit is used to calculate luminance signal that described extraction unit extracts in each regional maximum and minimum value;
The brightness determining unit is used for calculating according to described computing unit the maximum and the minimum value of each regional luminance signal, determines described each regional brightness.
9. stereoscopic TV as claimed in claim 8 is characterized in that, described luminance compensation module comprises:
Luminance compensation unit is used for adjusted each the regional luminance signal of described subregion brightness adjusting module is carried out luminance compensation;
Integral unit is used for each the regional luminance signal after the described luminance compensation unit compensation is incorporated into described YUV signal.
10. stereoscopic TV as claimed in claim 9 is characterized in that, described acquisition module comprises:
Acquiring unit is used for obtaining original rgb video signal from the stereoscopic TV mainboard;
Converting unit is used for the original rgb video signal that described acquiring unit obtains is changed, and obtains YUV signal.
11. as each described stereoscopic TV of claim 7-10, it is characterized in that, also comprise:
Presetting module is used in advance the liquid crystal panel of described stereoscopic TV is carried out subregion.
12. stereoscopic TV as claimed in claim 11 is characterized in that, also comprises:
Synchronization module extracts synchronizing signal from the YUV signal that described acquisition module obtains, described synchronizing signal is converted to the synchronizing signal of anaglyph spectacles, and the synchronizing signal after the described conversion is sent to described anaglyph spectacles.
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Application publication date: 20110921 |