CN101420541B

CN101420541B - Television system and video processing method therefor

Info

Publication number: CN101420541B
Application number: CN2007101679039A
Authority: CN
Inventors: 谢明展; 龚金盛; 谢建华
Original assignee: Realtek Semiconductor Corp
Current assignee: Realtek Semiconductor Corp
Priority date: 2007-10-26
Filing date: 2007-10-26
Publication date: 2012-02-01
Anticipated expiration: 2027-10-26
Also published as: CN101420541A

Abstract

The invention relates to a video processing method which is used in a television system. The method is as follows: video decoding treatment is carried out on a received incoming video signal; after video decoding treatment, de-alternizer treatment is carried out on the video signal which is treated by video decoding, and then a rest or relative rest image signal is generated; after de-alternizer treatment, the video signal which is treated by de-alternizer treatment and the rest or relative rest image signal are composited so as to generate a composite signal; the image is displayed according to the composite signal to cause that screen display control information (OSD) is always presented on the top layer of a display frame of a display panel.

Description

Television system and method for processing video frequency thereof

Technical field

The invention relates to the television image treatment technology, refer to especially screen display is controlled message (on screendisplay, the circuit and the method for OSD) synthesizing with vision signal (video signal).

Background technology

Traditional monitor; Like crt display, be called for short CRT (Cathode Ray Tube) and light-emitting diode display etc., because of being limited by factors such as the excessive or power consumption of its volume is very huge; Can't satisfy the user for the actual demand that is convenient for carrying, carries and install, in the consumption market, be eliminated gradually.In recent years, because the rapid technological improvement of flat-panel monitor (flat panel display), high-tech video and audio product is towards lighter, thin, short, little target development; With LCD (Liquid Crystal Display; Be called for short LCD) be example, low power consumption, volume are little because it possesses, zero radiation, advantage such as in light weight, so liked by the consumer and welcome; The market demand, occupation rate and the purposes that cause LCD are constantly grown up and expansion; Add that liquid crystal panel constantly is devoted to reduce cost, make LCD have and replace crt display gradually, and become following video and audio product rising star's trend.

Again; Piloting successively and starting broadcasting along with various countries' digital television broadcasting; Possess simultaneously in order to receive the LCD TV of anolog TV signals and digital television signal function, become the main flow of TV market development, the diversified function that the consumer is provided for this kind LCD TV; Go after like a flock of ducks invariably; The occupation rate of market that causes LCD TV in recent years is unprecedented soaring, also becomes to making each big manufacturer to drop into the production ranks of LCD TV one after another, and causing LCD TV all has great improvement and progress on image quality, color, visual angle and many additional functions.General speech; Be equipped with a LCD TV controller (LCD TV controller) in the LCD TV; In order to receive the vision signal of having accomplished demodulation and decoding; After the vision signal that is received into being carried out like operations such as deinterleave processing (de-interlacing), convergent-divergent processing (scaling) and/or color processing (colorprocessing), export a liquid crystal panel (LCD Panel) again to, supply the user to watch.

In existing LCD TV, can use screen display to control (On Screen Display mostly; Hereinafter to be referred as OSD) treatment technology; On the picture of LCD TV, produce some particular message that is available for users to control or figures; Make the user control TV change effect such as platform or adjustment volume, image quality the time, can demonstrate present state on the LCD TV, therefore; In the control circuit of LCD TV, set up an OSD control chip or in build an osd control circuit, promptly become a key Design in man-machine interface.Yet, in the design of present television system, after osd control circuit produces OSD message, all be to synthesize (blending) afterwards with vision signal earlier, the beginning will be synthesized the signal that finishes and carried out the deinterleave processing.Because OSD message is the image of static comparatively speaking (still) normally; After then it synthesizes with the vision signal that contains displacement (motion); Shi Changhui causes the difficulty in the judgement for the displacement detecting (motiondetection) of being carried out in the deinterleave processing; And make the deinterleave process result desirable not to the utmost, make picture produce the unclear problem of quality such as image blurring or color mistake.

Moreover; Show at the image of LCD TV; When if it has a plurality of vision signals sources (videosignal source), the vision signal of digital video signal and analog video signal or different channel etc. for example, television system instantly can provide picture-in-picture (picture in picture; PIP) function makes the vision signal of separate sources to be shown on the video screen simultaneously.Yet; If digital video signal combines with OSD message earlier; Just carry out the operation of picture-in-picture then with the vision signal (like analog video signal) in other source; Two kinds of following listed situations (seeing also the result after Fig. 1 a figure shows OSD message 11 and the digital video information of background combines, 1b analog video signal) then can take place:

(1) positive display digit TV programme on the mother picture of LCD TV; And on it and when showing OSD message 11; If the user is chosen in display simulation TV programme on the sprite of LCD TV; Then the image of analog television program will cover in the OSD message 11 of a part, shown in Fig. 1 c, causes the user and can't know and see that OSD is to control OSD smoothly;

(2) when on the mother picture of LCD TV during positive display simulation TV programme; If the user is chosen in display digit TV programme on the sprite of LCD TV; And carry out screen display and control, then OSD message 11 will be presented in the scope very narrow in the sprite, shown in Fig. 1 d; Watch very inconvenience, cause the user and be difficult for it is controlled.

Summary of the invention

Because that the foregoing liquid crystal TV when showing OSD message, is prone between image and message, take place is image blurring, the color mistake or and many disappearances such as picture conflict, the present invention provides a kind of television system and method for processing video frequency thereof, the phase can effectively solve aforementioned disappearance.

A purpose of the present invention; Provide a kind of television system; Be to comprise one first IC chip, one first coffret, one second coffret, one second IC chip and a display module; Wherein this first IC chip is to be respectively equipped with one first logic and one second logic, and this first logic is to be used for docking the vision signal that takes in to carry out one first Video processing, and this second logic produces a static or relative rest image signal; This first coffret is coupled to this first IC chip; Be used for transmitting through this through one first transformat and first patrol this vision signal of seizing after the processing, this second coffret is coupled to this first IC chip, is used for transmitting this static or relative rest image signal that is produced by this second logic through one second transformat; This second IC chip is to be respectively coupled to this first coffret and this second coffret; One the 3rd logic that is comprised in this second IC chip can be used to this vision signal after this processing that sends through this first coffret is carried out one second Video processing, and one the 4th logic that is comprised in this second IC chip is to be used for synthetic this static or relative rest image signal that sends through this second coffret that reaches through this vision signal after the 3rd logical process; To produce a composite signal; And this display module is to be coupled to the 4th logic, is used for according to this composite signal with display image, so; Can make OSD message be presented on the superiors of this display module display frame forever, effectively avoid aforesaid many disappearances.

Another object of the present invention; Provide a kind of method for processing video frequency, be used for a television system, this method is that the vision signal that butt joint takes in is carried out video decode processing; After carrying out this video decode processing; This vision signal to after handling through this video decode is carried out a deinterleave processing, produces a static or relative rest image signal again, after carrying out this deinterleave processing; Synthetic through this vision signal after this deinterleave processing and this static or relative rest image signal; To produce a composite signal,, make OSD message be present in the superiors of a display panels (LCDpanel) display frame forever again according to this composite signal display image.

For just your auditor can do further understanding and understanding to the object of the invention, technical characterictic and effect thereof, lift the embodiment conjunction with figs. now, specify as follows:

Description of drawings

Fig. 1 a～Fig. 1 d shows to carry out the sketch map that picture-in-picture is handled in the prior art;

Fig. 2 is the sketch map that shows according to the digital television system of one embodiment of the invention;

Fig. 3 is the sketch map that the OSD image shows.

The primary clustering symbol description

Digital television system ... ... 200

Side controller behind the DTV ... 210

CPU ... ... ..212

Demultiplexing circuit ... ... ..214

Audio decoder ... ... ... .216

Video Decoder ... ... ... .218

Drawing engine ... ... ... 220

Peripheral circuit ... ... ... 222

Audio interface controller ... ... 224

Internal bus ... ... ... 226

Bridge ... ... ... .228

Memory bus ... ... ... .230

Memory Controller ... ... ..232

Memory ... ... ... ..234

Video-stream processor ... ... ... .236

Video processor ... ... ... .238

Osd processor ... ... ... ..240

Audio playing apparatus ... ... ..242

The video signal transmission interface ... ... .244

Coffret ... ... ... 246

Analog television receiver ... ... 250

The LCD TV controller ... ... 260

The deinterleave processor ... ... 262

Picture-in-picture processor ... ... ..264

Combiner circuit ... ... ... 266

Display floater ... ... ... 270

Embodiment

For the purpose of convenience of the present invention is described; Be to be that example describes in following detailed description with the modal execution mode of present digital television system; For the optimization of manufacturing cost and the purpose of market segments; Present common digital television system 200; As shown in Figure 2 general, be analog television receiver (ATV receiver) 250, one LCD TV controller (LCDTV controller) 260 and one display floater 270 that side controller (digital TV backend controller) 210, receives anolog TV signals behind the functional part that all are required analog front circuit (the analog front end) (not shown) that is divided into a receiving digital television signal, the DTV.Generally speaking; The part of above-mentioned each differentiation can realize with one to two semiconductor integrated circuit chip (integrated circuit chip) of individual packages, and even again will the printed circuit board (PCB) that is integrated in a slice multi-disc (printed circuit board) on.But progress along with designed capacity and process technique; Following also might be above-mentioned each whole in distinguishing partly or one one be implemented on the crystal grain (die) of same chip; For example, with the major function in side controller behind the DTV 210 and the LCD TV controller 260, and other function of part is implemented in the same chip together; Be called DTV controller (digital TV controller), be a kind of possible integration mode.

In the embodiment of Fig. 2, only just carry out detailed explanation with technical characterictic relative section of the present invention, other composition assembly that belongs to digital television system is but non-for the necessary person of the present invention is described, and then the footpath row omits or representes with simple diagram.In the present embodiment; Side controller 210 is that self simulation front-end circuit (not shown) part receives the digital television signal data flow (transport packet stream) of passing through demodulation (demodulation) back, being packetized behind the DTV; And side controller 210 main functions are the video/audio/system information in the digital television signal that is received into (video/audio/system information) is separated behind the DTV; Carry out decode operation to video and audio signal respectively again; Decoded vision signal is then being sent to LCD TV controller 260 through after the Video processing, to carry out subsequent treatment.

In the present embodiment; Side controller 210 includes CPU (CPU) 212, is used for demultiplexing circuit 214, audio decoder 216, Video Decoder (for example MPEG2 decoder) 218, the drawing engine (graphic engine) 220 of V/A/SI Signal Separation and is used for and component units such as peripheral circuit 222 that external module (for example remote controller) is linked up behind the DTV, and each part mentioned above all is coupled to audio interface controller 224 and video-stream processor 236 through an internal bus 226.Behind the DTV side controller 210 also include one be used for store various kinds of data memory 234, it carries out access via a Memory Controller 232, and is coupled to video-stream processor 236 through a memory bus 230.Wherein, 232 of above-mentioned internal bus 226 and Memory Controllers are communicated with each other through a bridge (bus bridge) 228.Because the composition assembly of side controller 210 all is people institute well known of haveing the knack of digital television system behind above-mentioned each DTV, so its detailed operation principle and implementation are not promptly given unnecessary details at this.

Aforesaid audio interface controller 224 can receive through the audio signal behind the audio decoder, and it audio playing apparatus (a for example loud speaker) 242 that exports an outside to is play.Aforesaid video-stream processor 236 then can be divided into two parts: one of which is a video processor 238; It receives through the vision signal behind the video decode; It is carried out being resent to LCD TV controller 260, to carry out follow-up processing after specific video handles operation.The vision signal that 238 processing of video processor finish is through being sent to LCD TV controller 260 like common video signal transmission interfaces 244 such as CCIR656.Its another then be that a screen display is controlled message (on screen display; OSD) processor 240 (abbreviation osd processor); It is according to like the instruction that the user imported, and produces present the OSD picture signal that should show, and under the situation of not synthesizing with vision signal as yet; Utilize another independently coffret 246 (for example being used for transmitting the interface such as DVI or HDMI of numerical data), be sent to LCD TV controller 260.

After LCD TV controller 260 vision signal that side controller 210 is sent after receiving by DTV; That can utilize 262 pairs of deinterleave processors carries out the deinterleave processing, converts the signal format that is fit to the scanning of formula in proper order that display floater 270 shows into the signal format with original interleaved type scanning.If the desirable viewing mode of user is to switch to picture-in-picture (picture in picture at present; PIP) time; LCD TV controller 260 also can suitably make up the digital video signal that sent by side controller behind the DTV 210 and by the analog video signal that analog television receiver sent, to form the image of picture-in-picture through picture-in-picture processor 264.At last,, just understand processing via combiner circuit (blending circuit) 266 through the vision signal that is generated after the operation of aforementioned each functional part, again with DTV after the OSD picture signal that sent of side controller 210 synthesize.Then, again this final video signal after synthetic is sent to display floater, to play.

It is noted that at this, above-mentioned by the analog video signal that analog television receiver sent, generally also should pass through the processing of deinterleaveization, because this is not an emphasis of the present invention, so not at this detailed description; Picture-in-picture is handled the order relative like the deinterleave processing with other again; Belong to the selection in the system design; Non-must be like person described in embodiments of the invention and Fig. 2; Must exceed by a digital video and an analog video person of being synthesized and picture-in-picture is also non-, a plurality of digital videos and/or analog video also can be for it.Moreover; Though because of it is not that emphasis of the present invention is not illustrated in the present embodiment; But have the knack of should be appreciated that per capita of digital television system; LCD TV controller 260 also can include other and handle common handling process in the LCD TV controllers 260 such as (color processing) like zoom operations (scaling), color before the deinterleave processing, before the combiner circuit 266 or after the combiner circuit 266, and not only to be understood in the present embodiment that the revealer exceeds.

The people who has the knack of design of electronic circuits all should understand; Each mac function behind the foregoing DTV in side controller 210 and LCD TV controller 260 and other composition assembly; All can be according to design and the different demands of using, and select to adopt as use the special hardware circuit (dedicated hardwired circuitry) that specific integrated circuit (ASIC) waits or adopt the general procedure circuit logical circuits such as (general-purpose processing circuitry) that operates like microprocessor software such as (microprocessor) cooperation or facility program codes to realize.

Though be again to claim LCD TV controller 260 in the present embodiment; But those skilled in the art all should be appreciated that; The present invention only can be applicable to the liquid crystal panel technology, and except the LCD panel, other starches plane Display Techniques such as film face-plate, LCOS such as electricity; And even other is used in the on-plane surface Display Technique that digital TV image is play, and of the present invention being suitable for all arranged.

And it is inconsistent for fear of the output frequency of factor word vision signal and OSD message; And cause picture to tear the problem of (frame tear); LCD TV controller 260 also can be with time control (timing control) information that is produced in its operation; Like clock signal (clock signal), H-sync signal, V-sync signal etc., feedback and give osd processor, carry out the usefulness of simultaneous operation for it.

As stated; Digital television system 200 in an embodiment of the present invention is after behind DTV, producing the OSD image in the side controller 210; That is not about to earlier is synthetic with vision signal; And utilize one independently coffret the OSD picture signal is sent to LCD TV controller 260; After treating that vision signal completion deinterleave processing and/or picture-in-picture are handled, the beginning is synthesized processed video signal and OSD picture signal in resulting thus final picture; Promptly not can because of deinterleave processor 262 can't suitably judge vision signal/OSD picture signal synthetic result displacement whether, and cause the problem that has quality such as image blurring or color mistake clear; Also can after synthesizing, just not carry out the processing of picture-in-picture in advance, and cause the covered or too small situation of OSD picture to take place, as shown in Figure 3, OSD image 11 will appear at the superiors of whole picture at this moment.

Though the foregoing description is that the osd signal that is produced with digital television system 200 this locality (local) is the example explanation; But the people who has the knack of TV tech all should understand; The system information that notion of the present invention also can be applicable to send in the lump along with digital television signal from local side (system information, SI).In system information; Generally can include static image; As be positioned at the icon (subtitle) of one jiao in picture, static relatively image in time, and as being at interval with the several seconds, the captions (closed caption) or the spatially static relatively image that switch along with story of a play or opera evolution; As be arranged in the part of picture, the horse race lamp (scrolling or text crawling) that moves with fixed rate.Suchlike information; Just like aforesaid osd information; Because promptly be the independent person of difference with vision signal at the beginning of its reception or the generation, and the image of its representative all is to have static or static relatively characteristic, predictability is high; So be well suited for to avoid the deinterleave processing to be difficult for causing the not good problem of living image quality like the synthetic processing method of image of the present invention.If desire to apply the present invention in the processing of system information; Then video-stream processor 236 should include a SI processor; It receives the SI information of being separated; And produce corresponding SI picture signal, again it is sent to LCD TV controller 260 through coffret independently, with synthetic through deinterleave processed video signal.

What must stress at last is; Though be to be example in the above embodiment of the present invention with more common system design at present; Behind the DTV side controller 210 and LCD TV controller 260 be with respectively independently IC chip realize; Connect data and utilize to pass each other like coffrets such as CCIR656, HDMI or DVI; Even be able to the function of side controller behind the DTV 210 and LCD TV controller 260 even other part of digital television system 200 are integrated in the single IC chip because of development of technology but have the knack of should be understood that per capita from now on of TV tech and circuit design technique; The present invention still has it to be suitable for; That is needing only like static or static relatively images such as osd information or SI information is after video pictures carries out deinterleave processing or picture-in-picture processing, to begin to synthesize with it, all can reach the purpose of avoiding aforesaid drawbacks.

Press, the above is merely the best specific embodiment of the present invention, and only structural feature of the present invention is not limited thereto, any those skilled in the art in field of the present invention, can think easily and variation or modification, all can be encompassed in the claim of following this case.

Claims

1. television system, it includes:

One first IC chip, it includes:

One first logic is used for docking the digital video signal that takes in and carries out one first Video processing; And

One second logic is used for producing a static or relative rest image signal;

One first coffret is coupled to this first IC chip, is used for transmitting through this through one first transformat first patrolling this digital video signal of seizing after the processing;

One second coffret is coupled to this first IC chip, is used for transmitting this static or relative rest image signal that is produced by this second logic through one second transformat;

One second IC chip is coupled to this first coffret and this second coffret, and this second IC chip includes:

One the 3rd logic is used for this digital video signal after this processing that sends through this first coffret is carried out one second Video processing; And

One the 4th logic is used for synthetic through this digital video signal after the 3rd logical process and this static or relative rest image signal of sending through this second coffret, to produce a composite signal; Wherein this second IC chip includes one the 5th logic in addition, and this digital video signal and the picture-in-picture of another analog video signal that are used for passing through after the 3rd logical process are handled, and

One display module is coupled to the 4th logic, is used for according to this composite signal with display image.

2. television system as claimed in claim 1, wherein employed this second transformat of this second coffret is to meet HDMI standard or DVI standard.

3. television system as claimed in claim 2, wherein employed this first transformat of this first coffret is to meet the CCIR656 standard.

4. television system as claimed in claim 1, wherein the 3rd logic this second Video processing of carrying out includes a deinterleave processing.

5. television system as claimed in claim 4, wherein this first logic this first Video processing of carrying out includes a video decode and handles.

6. television system as claimed in claim 5, wherein this first logic this first Video processing of carrying out be one meet the MPEG2 standard video decode handle.

7. television system as claimed in claim 1, wherein this static or relative rest image signal of being produced of this second logic is to represent an OSD image or a system information image.

8. television system, it includes:

One first logic is used for docking the digital video signal that takes in and carries out one first Video processing, and wherein this first Video processing includes video decode processing;

One second logic is used for producing a static or relative rest image signal;

Controller, it includes:

One the 3rd logic is coupled to this first logic, is used for to carrying out one second Video processing through this digital video signal after this first logical process, and wherein this second Video processing includes a deinterleave processing;

One the 4th logic is coupled to this second logic and the 3rd logic, is used for synthesizing through this digital video signal after the 3rd logical process reaching this static or relative rest image signal that is produced by this second logic, to produce a composite signal; And

One display module is coupled to the 4th logic, is used for according to this composite signal with display image;

Wherein, other includes one the 5th logic, and this digital video signal and the picture-in-picture of another analog video signal that are used for passing through after the 3rd logical process are handled.

9. television system as claimed in claim 8, wherein to handle be to meet the MPEG2 standard to this video decode of carrying out of this first logic.

10. television system as claimed in claim 8, wherein this static or relative rest image signal of being produced of this second logic is represented an OSD image.

11. television system as claimed in claim 8, wherein this static or relative rest image signal of being produced of this second logic is represented a system information image.

12. a method for processing video frequency is used for a television system, this method includes:

The digital video signal that butt joint takes in carries out a video decode to be handled;

After carrying out this video decode processing, this digital video signal after handling through this video decode is carried out a deinterleave processing;

Produce a static or relative rest image signal;

After carrying out this deinterleave processing, synthetic through this digital video signal after this deinterleave processing and this static or relative rest image signal, to produce a composite signal; And

According to this composite signal, display image;

Wherein, this method also comprises: this digital video signal and the picture-in-picture of another analog video signal that pass through after this deinterleave processing are handled.

13. method for processing video frequency as claimed in claim 12, wherein this video decode processing is to meet the MPEG2 standard.

14. method for processing video frequency as claimed in claim 12, wherein this static or relative rest image signal is represented an OSD image.

15. method for processing video frequency as claimed in claim 12, wherein this static or relative rest image signal is represented a system information image.