CN201608833U

CN201608833U - Laser TV color gamut mapping system

Info

Publication number: CN201608833U
Application number: CN2010200031897U
Authority: CN
Inventors: 宋刚; 刘�英; 王洪君; 万强; 李义辉; 邱天星
Original assignee: Shandong University
Current assignee: Shandong University
Priority date: 2010-01-13
Filing date: 2010-01-13
Publication date: 2010-10-13
Anticipated expiration: 2020-01-13

Abstract

The utility model discloses a laser TV color gamut mapping system which has the advantages of simple structure and convenient use, and can sufficiently show the broader color gamut of laser display equipment; the structure of the laser TV color gamut mapping system is as follows: the laser TV color gamut mapping system includes a RGB signal input device which is connected with a data rotation distributor; the data rotation distributor is respectively connected with a table look-up module I, a 3D table look-up module and a table look-up module II; the table look-up module I and the table look-up module II are also connected with the 3D table look-up module; the table look-up module I is connected with an interpolation module I; the table look-up module II is connected with an interpolation module II; the 3D table look-up module, the interpolation module I and the interpolation module II are all connected with the data rotation distributor; the data rotation distributor completes shunting on the input data; the table look-up modules and the interpolation modules map colors; the data rotation distributor implements recombination on the mapped values; and the RGB value after extension mapping is stored in the 3D table look-up module.

Description

A kind of laser television Color Gamut Mapping system

Technical field

The utility model belongs to field of video displaying, is a kind of laser television Color Gamut Mapping system.

Background technology

The colour of equipment such as colour TV, display presents and all is based on the red-green-blue composition principle, and the color that one group of given primary colours can restore is in the delta-shaped region on summit at the point with the three primary colors place.The selection of three primary colors at present has only limited several international standards.

Advantages such as laser television is wide with its colour gamut, the color representation ability is strong have vast potential for future development.But the laser three primary colors that laser display is adopted are different with the three primary colors that existing video standard adopts, and the two difference is bigger, and the colour gamut of the laser display system also colour gamut than existing video standard is a lot of greatly.Directly, not only can not embody the wide colour gamut advantage of laser display apparatus, also misalignment and confusion can occur with existing vision signal driving laser display system.

The utility model content

For addressing the above problem, make laser television can on the basis of the existing video standard of compatibility, embody its color representation advantage, the utility model provides a kind of and has simple in structurely, easy to use, can demonstrate fully the laser television Color Gamut Mapping system of advantages such as the wide colour gamut of laser display apparatus.

For achieving the above object, the utility model adopts following technical scheme:

A kind of laser television Color Gamut Mapping system, it comprises the rgb signal input unit, the rgb signal input unit changes distributor with data wheel and is connected, data wheel is changeed distributor and is connected with table look-up module I, three dimensional lookup table module, table look-up module II respectively, and table look-up module I also is connected with the three dimensional lookup table module with table look-up module II; Table look-up module I is connected with interpolating module I, and table look-up module II is connected with interpolating module II, and three dimensional lookup table module, interpolating module I and interpolating module II all change receiver with data wheel and be connected; Data wheel is changeed distributor and is finished importing the shunting of data; Respectively table look-up, interpolating module carries out the mapping of color; Data wheel is changeed receiver the value after shining upon is recombinated; Deposit the rgb value after expansion is shone upon in the three dimensional lookup table module.

Described data wheel is changeed distributor and mainly is made up of d type flip flop and two 24bit bank of latches, two outputs of d type flip flop connect the input end of clock of two bank of latches respectively, make bank of latches carry out alternating sampling and maintenance to input signal, thereby reach the purpose of data distribution by the clock signal.

Described data wheel is changeed receiver and is made up of alternative data selector and latch.

Described rgb signal input unit is DVI receiver SII1161.

Described three dimensional lookup table module is a two-port RAM.

The utility model at first in the rgb space uniform sampling, and carries out gamut extension mapping to sampling point by aforementioned gamut extension mapping method in use, and the data that obtain are deposited in the look-up table; The look-up table that utilize to generate then makes up the Color Gamut Mapping system, the RGB data of any input is realized Color Gamut Mapping by the mode of searching with interpolation, thereby realize the Color Gamut Mapping of laser television.

The Color Gamut Mapping system comprises that rgb signal input unit, data wheel change distributor, look-up table, 2 and search module, 2 interpolating modules and data wheel and change receiver.Data wheel commentaries on classics distributor is shunted input value, and reduction is searched, the computational load of interpolating module, improves the stability of system simultaneously.Employing two covers are tabled look-up, interpolating module, guarantee the arithmetic speed and the real-time of system.Look-up table is a two-port RAM.It is foundation with the system clock that data wheel is changeed receiver, and two paths of signals is merged into one the tunnel.

The beneficial effects of the utility model are: operand is little, real-time is good, and display effect is good, can realize the expansion mapping of existing standard colour gamut to the laser display colour gamut, shade of color remains unchanged substantially before and after can making mapping, demonstrates fully the characteristics of the high saturated color of laser television, wide colour gamut simultaneously.

Description of drawings

Fig. 1 is the interpolation algorithm schematic diagram.

Fig. 2 is a laser television Color Gamut Mapping system architecture diagram of the present utility model.

Wherein, the 1.RGB signal input apparatus, 2. data wheel is changeed distributor, 3. table look-up module I, 4. three dimensional lookup table module, 5. table look-up module II, 6. data wheel commentaries on classics receiver, 7. interpolating module I, 8. interpolating module II.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

As shown in Figure 2, laser television Color Gamut Mapping of the present utility model system comprises rgb signal input unit 1, data wheel is changeed distributor 2, table look-up module I3, table look-up module II5, three dimensional lookup table module 4, interpolating module I7, interpolating module II8 and data wheel changes receiver 6.Data wheel is changeed distributor 2 and is finished importing the shunting of data; Respectively table look-up, interpolating module carries out the mapping of color; The value that data wheel is changeed after 6 pairs of mappings of receiver is recombinated; Deposit the rgb value after expansion is shone upon in the look-up table.

The utility model adopts the mode of tabling look-up with interpolation to realize Color Gamut Mapping, and its principle is: at first rgb space evenly is divided into 16x16x16 small cubes, Color Gamut Mapping is carried out on the summit of each small cubes, and deposit the mapping value that obtains in look-up table; Point in the small cubes can be by shining upon the mode of this cube summit linear interpolation, thereby realize the mapping of whole rgb space.

To the rgb value of any input, at first determine the small cubes at its place.The Gao Siwei of R, G, B input value can determine the small cubes at this place, and can directly determine the index value of cube summit in three dimensional lookup table.Point P (Bin) eight of the place the index values of cube summit in look-up table are respectively for Rin, Gin: (and R, G, B), (R+1, G, B), (R, G+1, B), (R+1, G+1, B), (R, G, B+1), (R+1, G, B+1), (R+1, G+1, B+1), (R, G+1, B+1), R=Rin[7:4 wherein], G=Gin[7:4] and, B=Bin[7:4].

Being tabled look-up by index value to obtain the mapping value on cube summit, input point place, and then tries to achieve the mapping value of input point by interpolation.

Accompanying drawing 1 is a small cubes in the rgb space, stores H, I, J, K, L, M, N, mapping value H ', the I ' on eight summits of O, J ' K ', L ', M ', N ', O ' in the look-up table.For this cube internal point P (R _In, G _In, B _In) mapping value P ', can be by H ', I ', J ', K ', L ', M ', N ', O ' and Rin[3:0], Gin[3:0], Bin[3:0] obtain by formula 7.

R _HI＝(R _H′×(16-r)+R _I′×r)/16 (7-1)

R _KJ＝(R _K′×(16-r)+R _J′×r)/16 (7-2)

R _HIJK＝(R _HI×(16-r)+R _KJ×r)/16 (7-3)

In the formula, R _HI, R _KJ, R _HIJKR value for accompanying drawing 1 mid point HI, KJ, HIJK; R _{H '}, R _{I '}, R _{J '}, R _{K '}Be respectively the R value of a H ', I ', J ', K '; R is R _InLow four, i.e. R _In[3:0].

In like manner can try to achieve R _LMNOSo, obtain P (R _In, G _In, B _In) the R component of mapping value P ' be:

R _P′＝(R _HIIK×(16-r)+R _LMNO×r)/16 (7-4)

In like manner can get G component and the B component of P '.

Data wheel is changeed distributor 2 and mainly is made up of d type flip flop and two 24bit bank of latches.Two outputs of d type flip flop connect the input end of clock of two bank of latches respectively, make bank of latches carry out alternating sampling and maintenance to input signal by the clock signal, thereby reach the purpose of data distribution, make that two covers are tabled look-up, the interpolating module concurrent working, improve the arithmetic speed and the stability of system.

Table look-up module I3, table look-up module II5 extract the high four of input rgb value, and calculate the index value on cubical summit, input value place, and the visit look-up table obtains the mapping value on cube summit.

Interpolating module I7, interpolating module II8 carry out interpolation calculation to input value according to above-mentioned principle, obtain the mapping value of input value.

Data wheel commentaries on classics receiver 6 is made up of alternative data selector and bank of latches (24bit), and the two paths of data after handling is recombinated, and system can have the mapping of video standard colour gamut to the laser display colour gamut in real time now.

Three dimensional lookup table module 4 is a two-port RAM, and wherein the data in the three dimensional lookup table carry out uniform sampling to the RGB color space and sampled point shone upon by aforesaid gamut extension mapping method obtaining.

Table look-up module I3, table look-up module II5, interpolating module I7 and interpolating module II8 can adopt the Cyclone IIFPGA chip of programmable logic device altera corp to realize.

Claims

1. laser television Color Gamut Mapping system, it is characterized in that, it comprises the rgb signal input unit, the rgb signal input unit changes distributor with data wheel and is connected, data wheel is changeed distributor and is connected with table look-up module I, three dimensional lookup table module, table look-up module II respectively, and table look-up module I also is connected with the three dimensional lookup table module with table look-up module II; Table look-up module I is connected with interpolating module I, and table look-up module II is connected with interpolating module II, and three dimensional lookup table module, interpolating module I and interpolating module II all change receiver with data wheel and be connected; Data wheel is changeed distributor and is finished importing the shunting of data; Respectively table look-up, interpolating module carries out the mapping of color; Data wheel is changeed receiver the value after shining upon is recombinated; Deposit the rgb value after expansion is shone upon in the three dimensional lookup table module.

2. laser television Color Gamut Mapping as claimed in claim 1 system, it is characterized in that, described data wheel is changeed distributor and mainly is made up of d type flip flop and two 24bit bank of latches, two outputs of d type flip flop connect the input end of clock of two bank of latches respectively, make bank of latches carry out alternating sampling and maintenance to input signal, thereby reach the purpose of data distribution by the clock signal.

3. laser television Color Gamut Mapping as claimed in claim 1 system is characterized in that, described data wheel is changeed receiver and is made up of alternative data selector and latch.

4. laser television Color Gamut Mapping as claimed in claim 1 system is characterized in that described rgb signal input unit is DVI receiver SII1161.

5. laser television Color Gamut Mapping as claimed in claim 1 system is characterized in that described three dimensional lookup table module is a two-port RAM.