TW200901762A - Video-display device and method thereof - Google Patents

Abstract

A video-display device, including a timing generator, a main-source processing unit and a sub-source processing unit, is disclosed. The timing generator outputs a first horizontal synchronizing signal. The main-source processing unit is used to fetch many main-source data signals and outputs the main-source data signals sequentially according to the first horizontal synchronizing signal. The sub-source processing unit includes a delay device and a scaler. The delay device is coupled to the timing generator to make the first horizontal synchronizing signal delayed by a pre-fetch period and to output a second horizontal synchronizing signal correspondingly. The scaler is coupled to the delay device to fetch many first sub-source data signal to scale them and outputs many second sub-source data signals after being scaled sequentially according to the second horizontal synchronizing signal.

Description

200901762

The invention relates to an image display device and a method thereof, and more particularly to an image display device using a delayed horizontal synchronization signal to save bandwidth and Its method. [Prior Art] Referring to Fig. 1, there is shown a timing f - diagram of a conventional image display device. The horizontal sync signal Hsync is sent at time t0. Then, the main face data signal MS is read at time t1, and then the sub-surface data signal SS is read at time t2. Since the sub-surface data signal SS is to be read, the data request signal Data_req must have two consecutive pulse waves starting at time t2, and the two consecutive pulse waves are essentially used to respectively require the sub-surface to be relative to the main picture. Start position and end position. However, if the pulse width of the data request signal Data_req is equal, and the pulse width of the sub-surface data signal SS is as shown in FIG. 1, the data request signal Data_req' is sent with the horizontal synchronization signal Hsync at time t3. The next pulse wave overlaps, so the data request signal Data_req' cannot send the second pulse wave. Therefore, the traditional method is to compress the pulse width of the data request signal Data_req, so that the two pulse waves of the data request signal Data_req are transmitted before time t3. However, in this way, the unit of the processing data signal in the image display device will occupy a larger ratio of the bandwidth, so that the available bandwidth of the unit and other units for processing the main data signal is reduced, and Increased power consumption. 6 200901762

Sanda Number: TW2690PA SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide an image display apparatus and method thereof that utilizes a delayed horizontal sync signal to save bandwidth. In accordance with an object of the present invention, an image display apparatus is provided that includes a timing generation, a main surface processing unit, and a sub-surface processing unit. The timing generator is operative to generate a first horizontal sync signal. The main picture processing unit extracts a plurality of main picture data signals according to the first horizontal synchronization signal, and sequentially outputs the main f and the side data signals. The sub-surface processing unit includes a delay device and a size scaler. The delay device is coupled to the timing generator for delaying the first horizontal synchronization signal by a pre-fetch period and rotating the second horizontal synchronization signal accordingly. The size scaler is coupled to the delay device, and the plurality of first sub-surface data signals are extracted according to the second horizontal synchronization signal to perform a size scaling operation, and sequentially output the plurality of second sub-surface data signals after the size scaling . According to another aspect of the present invention, an image processing method is provided for performing image processing on a plurality of first sub-surface data signals, including, firstly, generating a first horizontal synchronization signal. Then, according to the first horizontal synchronization signal, a plurality of main data signals are acquired, and the main picture data signals are sequentially output. Thereafter, the first horizontal sync signal is delayed by the pre-fetch period, and the second horizontal sync signal is obtained accordingly. Then, the first sub-surface data signal is captured according to the second horizontal synchronization signal to perform a size scaling operation, and the plurality of second sub-surface data signals after the size reduction are sequentially output. According to an object of the present invention, an image superimposing method is further provided, comprising: firstly, sequentially fetching a plurality of main facial data signals according to a first horizontal synchronizing signal. Then, according to a second horizontal synchronization signal, sequentially capture a plurality of 7 200901762

Sanda number: TW2690PA The first sub-surface data signal' wherein the second horizontal synchronization signal is delayed by one pre-fetch period compared to the first horizontal synchronization signal. Then, a size-scaling action is performed on the 7 + 2nd T-one brother's face-to-face lean signal to generate a two-child greedy tribute. After that, the main data signal and the corresponding second sub-book data signal are mixed to generate a mixed surface, wherein one of the corresponding sub-surface data signals is superimposed on the data signal corresponding to the main surface data. One of the main screens ^. In order to achieve the above objects, features, and advantages of the present invention, a preferred embodiment will be described below in detail with reference to the accompanying drawings. 2 is a block diagram of an image display device in accordance with a preferred embodiment of the present invention. The image display device 2 includes a face buffer (add 1 shape), a timing generator 2〇6, a register 2 (^, a sub-surface processing unit 210, and a main buffer processing unit 212). And the mixer 2 is 4. The sub-surface unit 210 further includes a delay device 21〇2 and a size scaler 2104. The image display device 2 is, for example, a flat display or a player. 204 receiving a plurality of main data signals M s and a plurality of first sub-written data signals ssi from the main source and the sub-source sources (not shown) and temporarily storing the main picture data signals Ms and The first-level data signal SS-timer generator generates a first-level same-number Hsync main picture processing unit 212 coupled to the face buffer and timing generator 2〇6, which is configured to be based on the first horizontal synchronization signal 8 200901762

Sanda number: TW2_PA

The Hsync 1 ’ retrieves a plurality of main face data signals Ms from the face buffer 204, and then the main face processing unit 212 sequentially outputs the main face data signals to the mixer 214. The temporary storage 208 is connected to the timing generator 206 for storing the timing generator 208 to output another horizontal displacement signal XP〇s, and horizontally shifting the 5-hole? Tiger X-P OS output to the sub-surface processing unit 21 The delay device 2102 in the middle. The delay device 2102 is coupled to the timing generator 2〇6, and delays the first horizontal synchronization signal Hsync1 by a pre-fetch period according to the horizontal displacement signal Xjp〇S received from the buffer: And outputting the second horizontal synchronization signal Hsync2 to the size scaler 2104 accordingly. In this case, the first horizontal synchronization signal Hsync1 is delayed by the start time difference between the pulse wave of the main data signal MS and the pulse signal of the first sub-surface data signal SS1 to form a second horizontal synchronization signal Hsync2 〇 size The scaler 2104 is coupled to the delay device 21〇2, and extracts a plurality of first-sub-surface data signals SS1 from the face buffer 204 according to the second horizontal synchronization signal Hsync2 to perform a size scaling operation, and then sequentially outputs After scaling, a plurality of second sub-surface data signals SS2. The size of the surface of the second sub-surface data signal SS2 is smaller than the size of the surface of the first sub-surface data signal SS1, but the resolution is greater than or equal to the first sub-surface data signal SS1 The resolution of the face presented. In addition, the sub-picture corresponding to the second sub-picture data signal SS2 has a horizontal displacement compared to the main surface corresponding to the main surface data signal Ms, and the pixel display time of the horizontal displacement is For the pre-fetch cycle. The sub-face is displayed on a screen (〇SD) sub-plane or an image 9 200901762

Sanda number: The form of the image (pip) sub-surface in TW2690PA exists in the main screen. The mixer 214 is, for example, a mixer coupled to the main surface processing unit 212 and the sub-surface processing unit 210, receives the main data signal MS from the main picture processing unit 212, and receives the main data from the sub-surface processing unit 210. The second sub-surface data signal SS2 is then mixed with the main picture data signal MS and the second sub-surface data signal SS2 to output the kneading signal S. Please refer to FIG. 3, which is a flow chart of an image processing method according to a preferred embodiment of the present invention. First, in step 302, a first f horizontal sync signal is generated. Then, in step 304, a plurality of main data signals are extracted according to the first horizontal synchronization signal, and the main data signals are sequentially output. Then, in step 306, the first horizontal synchronization signal is delayed by a pre-fetch period, and the second horizontal synchronization signal is obtained accordingly. Then, in step 308, a plurality of first sub-surface data signals are extracted according to the second horizontal synchronization signal to perform a size scaling operation, and a plurality of second sub-surface data signals are obtained, and then multiple seconds are sequentially output. Sub-surface data f signal. Then, in step 310, the main data signal and the second sub-picture data signal are mixed to output a side signal. Please refer to FIG. 4, which is a timing diagram of an image display device 200 in accordance with a preferred embodiment of the present invention. At the zeroth time t0', the timing generator 206 sends the first horizontal synchronization signal Hsync1, and then the buffer register 204 starts to output the main picture data signal MS to the main buffer processing unit 212, and transmits it before the second time t2'. Finished. At the first time t1', the delay device 2102 sends the second horizontal synchronization signal Hsync2 to the size scaler 2104, and then the face buffer 204 starts outputting the first sub-picture data signals SS1 to 200901762.

Sanda number: TW2690PA size scaler 2104. The first sub-surface data signal SS1 includes two consecutive pulse waves, and the two consecutive pulse waves are substantially the start position and the end position of the sub-picture relative to the main picture, respectively. Since the second horizontal synchronization signal Hsync2 is slower than the first horizontal synchronization signal Hsync1, the pre-fetch period Δt=tl'-t0', the consecutive two pulses of the first sub-picture data signal SS1 can be in the third time. T3, before the transfer is completed. In Fig. 4, the difference between the zeroth time t0' and the first time t1 is the first, and the period difference between the horizontal synchronizing signal Hsync1 and the second horizontal synchronizing signal Hsync2 is the corresponding pre-fetching period. Further, at the third time t3', the timing controller 306 sends a pulse wave below the second horizontal synchronizing signal Hsync2. The image display device and the method thereof disclosed in the above embodiments of the present invention utilize a delayed horizontal synchronization signal to save bandwidth. The period of the first horizontal synchronization signal Hsync2 in the embodiment is shorter than the period delay time t1'-tQ of the first horizontal synchronization signal Hsync1, so that the two consecutive pulses of the first sub-surface data signal ^ are not related to the second level. The t-pulse of the sync signal Hsync2 is vertical, so there is no need to compress the two pulse waves of the first sub-picture data signal SS1, so that the bandwidth can be saved, so that the processing rate S processing unit and other units can be used. The invention has been described above with reference to a preferred embodiment, and the invention is limited to the invention, and/or those skilled in the art, without departing from the invention. ^ and Fan # can be used for a variety of changes and retouching, so accurate. I Scope is defined as the scope of the patent application attached to it. 11 200901762

Sanda number: TW2690PA [Simple description of the drawing] Figure 1 shows the timing diagram of the conventional image display device. 2 is a block diagram of an image display device in accordance with a preferred embodiment of the present invention. FIG. 3 is a flow chart showing an image processing method according to a preferred embodiment of the present invention. FIG. 4 is a timing diagram of an image display device 200 in accordance with a preferred embodiment of the present invention. Fv [Description of main component symbols] 200: Image display device 204: Face buffer 206: Timing generator 208: Register 210: Sub-surface processing unit 212: Main surface processing unit, 214: Mixer 2102: Delay device 2104: size scaler 12

Claims (1)

200901762 Sanda number: TW2690PA X. Patent application scope: 1. An image display device comprising: a timing generator for generating a first horizontal synchronization signal; and a main surface processing unit for synchronizing according to the first level The signal captures a plurality of main data signals and sequentially outputs the main data signals; and a sub-surface processing unit includes: a delay device coupled to the timing generator to The first horizontal synchronization signal is delayed by a pre-fetch period, and a second horizontal synchronization signal is outputted therefrom; and a size scaler is coupled to the delay device according to the second level The synchronization signal captures a plurality of first sub-picture data signals for performing a size scaling operation, and sequentially outputs a plurality of second sub-surface data signals after the size scaling. 2. The image display device as claimed in claim 1, wherein one of the sub-pictures corresponding to the second sub-surface data signal has a level relative to one of the main sub-surface data signals corresponding to the main data. The amount of displacement, and the pre-fetch period does not exceed the pixel display time corresponding to the horizontal displacement. 1. The image display device of claim 2, wherein the pre-fetching period is a pixel display time corresponding to a horizontal displacement amount. 4. The image display device of claim 3, further comprising: a register, the register to the timing controller, for receiving a horizontal displacement corresponding to the horizontal displacement, and The horizontal displacement 13 200901762 three-numbered - TW2690PA signal is output to the delay device, and the delay device delays the first horizontal synchronization signal by the pre-sampling period as the second horizontal synchronization signal according to the horizontal displacement signal. 5. The image display device of claim 2, further comprising a frame buffer, the main surface processing unit and the sub-surface processing unit for temporarily storing the These main data signals and the first sub-data signals. 6. The image display device according to claim 2, wherein the sub-face is an on-screen display (OSD) sub-plane or an image-in-picture (PIP) sub-plane . 7. The image display device of claim 1, further comprising a mixer coupled to the main surface processing unit and the sub-surface processing unit for mixing the main surface data The signal and the corresponding second sub-surface data signals are output to output a side signal. 8. The image display device of claim 1, wherein the image display device is used in a flat panel display or a DVD player. An image processing method for performing image processing on a plurality of first sub-surface data signals, comprising: generating a first horizontal synchronization signal; and extracting a plurality of main surface data signals according to the first horizontal synchronization signal, And outputting the main horizontal data signals in sequence; delaying the first horizontal synchronization signal by a pre-fetch period, and obtaining a second horizontal synchronization signal; and according to the second horizontal synchronization signal Extracting the first sub-surface data 14 200901762 Sanda number: TW2690PA signal to perform a size zooming operation, and sequentially output a plurality of second sub-surface data signals after the size scaling. 10. The image processing method according to claim 9, wherein one of the second sub-surface data signals has a horizontal displacement relative to one of the main picture signals corresponding to the main data signals. The amount, and the pre-fetch period does not exceed the pixel display time corresponding to the horizontal displacement. 11. The image processing method according to claim 10, wherein the pre-fetching period is a pixel display time corresponding to the horizontal displacement amount. 12. The image processing method according to claim 10, wherein the sub-face is displayed on an on-screen display (OSD) or in-video (PIP) mode. 13. The image processing method of claim 9, further comprising mixing the main data signals and the corresponding second sub-β data signals into a single signal. I.· 14. An image superimposition method, comprising: sequentially capturing a plurality of main facial data signals according to a first horizontal synchronization signal; and sequentially capturing a plurality of first sub-surface data according to a second horizontal synchronization signal a signal, wherein the second horizontal synchronization signal is delayed by a pre-fetch period compared to the first horizontal synchronization signal; and the first sub-surface data signal is subjected to a size scaling operation to generate a plurality of second sub-surfaces Information; and 15 200901762 . Sanda number: TW2690PA mixes the main data signals and corresponding second sub-surface data signals to generate a hybrid surface, which corresponds to the second sub-surface data signal A sub-surface is superimposed on a main surface corresponding to one of the main data signals. 15. The image overlay method of claim 14, wherein the pre-fetch time is determined by a horizontal displacement between the main face and the child face. 16. The method according to claim 14, wherein the first horizontal synchronization signal and the horizontal displacement signal are generated by a timing generator, and the first horizontal synchronization signal is delayed according to the horizontal displacement signal. The second horizontal synchronization signal is generated. 17. The image overlay method of claim 14, wherein the output of the second sub-picture data signals is later than the output of the main data signals. 18. The image overlay method of claim 17, wherein - the delay of the output of the second sub-surface data signals relative to the output of the main data signals is related to the pre-fetch period. 16