CN1642290A - Colour matrix processing apparatus and method - Google Patents

Abstract

The invention discloses an color matrix processing device and method, where the device includes video switching device, Y/C separating device and decoding and video processing device, interconnected in turn and its characteristic: it also includes: natural color matrix device with an input end connected with the decoding and video processing device, used to convert YUV signals into RGB signals to be displayed by the final stage. Because it adopts NCM (natural color matrix technique), the obtained image more approaches to real color. Besides, it regulates the RGB signals, respectively and directly makes real-time point-by-point correction on digital signals before D/A conversion, thus assuring the accuracy of output signal.

Description

Color matrices processing unit and method

[technical field]:

The present invention relates to a kind of color matrices processing unit and method, be used for image display apparatus such as color television set.

[background technology]:

In image display apparatus such as color television set, vision signal will be converted to rgb signal by YUV signal and be shown by final stage through a matrixing at last through various processing.Adopt simple space transformation matrix figure (as shown in Figure 1), color rendition degree lower (as shown in Figure 2) at present mostly.

And do the γ adjustment usually and just adopt the analogy method adjustment at brightness, the accuracy of output signal is not the highest like this.

[summary of the invention]:

Purpose of the present invention is exactly in order to overcome the above problems, and a kind of color matrices processing unit and method are provided, and the color rendition degree is approached truly more.

For achieving the above object, the present invention proposes a kind of color matrices processing unit and method.

Described color matrices processing unit comprises video switching device, Y/C separator and decoding and the video process apparatus that links to each other successively, it is characterized in that also comprising: the natural colour matrix arrangement, its input links to each other with decoding and video process apparatus, is used for that YUV signal is converted to rgb signal and is shown by final stage.

Described color matrices processing method comprises the steps: A, will carry out the Y/C separation from the signal of video switching device shifter; B, decode and Video processing; C, carry out the natural colour matrixing, YUV signal is converted to rgb signal shows by final stage.

Because adopted above scheme, owing to adopt NCM (natural colour Matrix Technology), resulting image is more near realistic colour, Fig. 3 has illustrated its effect.

[description of drawings]:

Fig. 1 is a prior art scheme schematic diagram.

Fig. 2 is a prior art color rendition schematic diagram.

Fig. 3 is a color rendition schematic diagram of the present invention.

Fig. 4 is the present invention program's schematic diagram.

[embodiment]:

Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.

See Fig. 4, color matrices processing unit of the present invention comprises video switching device 1, Y/C separator 2, decoding and video process apparatus 3, the natural colour matrix arrangement 4 that links to each other successively, described natural colour matrix arrangement 4 inputs link to each other with decoding and video process apparatus 3, are used for that YUV signal is converted to rgb signal and are shown by final stage.

Adopt NCM (natural colour Matrix Technology) resulting image (Fig. 3) more near realistic colour.

And, also comprising real-time gamma correction circuit 5 in the device, its input links to each other with natural colour matrix arrangement 4, and output links to each other with the output 6 of whole device.Especially, described real-time gamma correction circuit is positioned at before the D/A converting means, and rgb signal is carried out real-time pointwise correction respectively.Its formula is as follows:

$\left[\begin{array}{c}\mathrm{Ro}\\ \mathrm{Go}\\ \mathrm{Bo}\end{array}\right]=\left[\mathrm{\Γ}\right]\left[\begin{array}{c}\mathrm{Ri}\\ \mathrm{Gi}\\ \mathrm{Bi}\end{array}\right]$

Generally making γ adjusts just at the adjustment of brightness employing analogy method, consider the problem that the final stage display part may occur, we RGB is adjusted respectively and directly before the D/A conversion to the real-time pointwise correction of digital signal, thereby guaranteed the accuracy of output signal.

Claims (5)

1, a kind of color matrices processing unit, comprise video switching device (1), Y/C separator (2) and the decoding and the video process apparatus (3) that link to each other successively, it is characterized in that also comprising: natural colour matrix arrangement (4), its input links to each other with decoding and video process apparatus (3), is used for that YUV signal is converted to rgb signal and is shown by final stage.

2, color matrices processing unit as claimed in claim 1 is characterized in that: also comprise real-time gamma correction circuit (5), its input links to each other with natural colour matrix arrangement (4).

3, color matrices processing unit as claimed in claim 2 is characterized in that: described real-time gamma correction circuit is positioned at before the D/A converting means, and rgb signal is carried out real-time pointwise correction respectively.

4, a kind of color matrices processing method comprises the steps:

A, will carry out Y/C from the signal of video switching device shifter (1) and separate;

B, decode and Video processing;

C, carry out the natural colour matrixing, YUV signal is converted to rgb signal shows by final stage.

5, color matrices processing method as claimed in claim 4 is characterized in that: also comprise the steps: after step C after YUV signal is converted to rgb signal, rgb signal carried out real-time pointwise γ respectively before the D/A conversion and proofread and correct.

Images