TWI240571B - Digital television receiver capable of adaptively processing received video signals - Google Patents

Abstract

The invention provides a digital television receiver capable of adaptively processing video signals received from one of a plurality of video signal sources. The digital television receiver, according to the invention, selectively multiplies the frequency of the received video signals to meet one of a plurality of predetermined formats in accordance with the transmitting rate of the received video signals. Then, the digital television receiver outputs the frequency-multiplied video signals or the received video signals without frequency multiplying.

Description

1240571 V. Description of the invention (ο 1. Technical field to which the invention belongs The invention relates to a digital television receiver and its related signal processing flow, and in particular, the invention relates to adaptably A digital TV receiver that processes video signals received from one of the video signal sources (Video signal source). 2. The prior art's current format (resolution) for digital TV video signals, including 4801 (Transmission rate: 15k bps), 480P (transmission rate: 31k bps), 1 080 1 (transmission rate: 33k bps), and 720P (transmission rate: 45k bps). In the video format above, the numbers represent the Number of horizontal scanning lines, the letter I represents that the picture is composed of interlaced scans, and the letter P represents that the picture is composed of sequential scans (progres # sive scan). As the digits move towards high-resolution digital television ( High definition television (HDTV) development, most of the current digital television receivers responsible for processing video signals have Low-resolution video signals do frequency multiplying. However, current digital TV receivers with frequency-doubling functions perform frequency-doubling processing on all received video signals, regardless of their own resolution. The received video signal is a high-resolution signal, for example, a signal that conforms to the 1 0 0 0 1 format. Current digital TV receivers with multiplier functions still do the multiplication process, so that the signal resolution conforms to the 48 0P format. but

1240571 V. Description of the invention (2) Yes, in the above-mentioned case, not only did not improve the display quality, it would even reduce the display quality ’and there was a risk of wasting computing resources. Therefore, the object of the present invention is to provide a digital television receiver and its related signal processing flow, and in particular, the digital television reception according to the present invention and the signal processing process can optimize the processing from multiple sources of vision Video signal received at one of the video signal sources. 3. Summary of the Invention A digital transmission system according to a preferred embodiment of the present invention is capable of optimally processing a video signal received from one of a plurality of video signal sources. The digital television receiver includes a controller and a signal multiplier. The controller has multiple low-resolution output terminals and multiple high-resolution output terminals. The controller is used to scatter the video signal from the video signal source, and from the plurality of low-resolution output terminals and the plurality of high-resolution output terminals according to the received video signal transmission rate. An output terminal outputs the received video signal. The signal frequency doubling device is electrically connected with a plurality of low-resolution output terminals of the control Is. The signal multiplier has an analog output port and a digital output port. When the signal multiplier device receives a video signal from one of the multiple low-resolution output terminals of the controller, the signal multiplier device selectively executes the received signal. The frequency doubling processing causes the received signal to conform to one of a plurality of predetermined formats. The signal multiplier device then outputs a video signal conforming to the predetermined format from the analog output port and the digital output port. Multiple heights of the controller

wm IHIHH Page 6 1240571 V. Description of the invention (3) Each of the high-resolution output terminals is electrically coupled to the analog output port and digital output port of the signal multiplier device, respectively. According to the signal processing process performed by the digital television receiver of the present invention, first, the digital television receiver receives a video signal from a video signal source among the plurality of video signal sources. Then, according to the transmission rate of the received video signal, frequency multiplication processing is selectively performed on the received video signal so that the received signal conforms to one of a plurality of predetermined formats. Finally, the video signal that has been multiplied or the video signal that has been received without being multiplied is output at the analog output port and the digital output port. The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings. 4. Implementation The object of the present invention is to provide a digital television receiver and its related signal processing flow, and in particular, the digital pull television receiver and the signal processing flow according to the present invention can optimize the processing from multiple video signal sources Video signal received at one of the video signal sources. The preferred embodiments of the present invention will be described in detail below, so as to fully explain the features, spirit, advantages, and simplicity of application of the present invention. Please refer to FIG. 1. FIG. 1 schematically illustrates a digital television receiver 10 and an implementation environment thereof according to a preferred embodiment of the present invention. The digital television receiver 10 according to a preferred embodiment of the present invention, like a typical digital television receiver, can cooperate to receive signals from various external video signal sources.

1240571 V. The signal of invention description (4), such as the video signal source (2 0 a ~ 2 0 e) shown in Figure 1. The video signal sources shown in the first one include a set-top box 20a, a game console 20b, a DVD player 20c, a Digital-VHS recorder 20d, and a television tuner 20e. . The video converter 20a in Figure 1 can be designed to meet the receiving standards such as European standards: DVB-TC for terrestrial broadcasting), DVB-C (for cable transmission), DVB-S (for satellite transmission), DVB-IP (for Internet transmission) ... etc. The video converter 20a in Fig. 1 is like a general video converter, and its signal transmission rate is 15k bps. The game machine 20b in Figure 1 is like a general game machine, and its signal transmission rate is 15k bps, or it is converted into 31k bps, 33k bps, and 45k bps by multiplication. The DVD player 20c in Fig. 1 is like an existing optical drive, and has various signal resolution specifications. The signal transmission rate includes 15k bps, 31k bps, 3 3k bps, 4 5k bps, etc. Digital-VHS recorder 20d shown in Figure 1, its signal transmission rate is 33k bps. The TV mediator 20e in Figure 1 is designed to receive analog signals from a cable TV signal or terrestrial broadcast signal. Its signal transmission rate is 15k bps. That is, the display formats of the video signal that can be received by the digital television receiver according to the preferred embodiment of the present invention include the currently commonly used formats such as 4801, 480P, 10801, 720P, etc. The digital television receiver 10 according to a preferred embodiment of the present invention includes a controller 12 and a signal multiplying device 14. As shown in the first example, the controller 12 has a plurality of input terminals (124a to 124d). Each of the plurality of input terminals (124a to 124d)

1240571 V. Description of the Invention (5) Cooperate to receive video signals from some of the multiple video signal sources (20a ~ 20e). For example, the input terminal 1 2 a is an A V terminal, which can receive signals from the video converter 20a, the game machine 20b, the DVD player 20c, and the Digital-VHS video player 20d in FIG. The input terminal 12 4b is an S terminal, and can receive signals from the video converter 20a, the game machine 20b, the DVD player 20c, and the Digital-VHS recorder 20d in FIG. The input terminal 124c is a color difference terminal, for example, a color difference terminal such as YPbPr or YCbCr, which can receive signals from the video converter 20a, the game machine 20b, the DVD player 20c, and the Digital-VHS recorder 20d in FIG. The terminal I24d is an RF terminal, which can receive the signal from the TV conditioner 20e in FIG. The controller 12 has a plurality of low-resolution output terminals (for example, the low-resolution output terminals 122a and 122b in FIG. 1) and a plurality of high-resolution output terminals (for example, the output terminals 1 22c and 122d in FIG. 1). ). The controller 12 receives a video signal from one of the plurality of video signal sources (20a to 20e) through one of the input terminals d 24a to 124d). The controller 12 also outputs one from the plurality of low-resolution output terminals (122a, 12, 2b) and the plurality of high-resolution output terminals (122c, 122d) according to the transmission rate of the received video signal. The terminal output_ outputs the received video signal. As shown in FIG. 1, the signal multiplier device 14 has multiple input ports (for example, input ports 146 a and 146 b in the first unit), and multiple low-resolution output terminals (122 a and 122 b) of the controller 12, respectively. One of the output terminals is electrically turned on. For example, the input port 146a in FIG. 1 is electrically coupled to the low-resolution output.

Page 9 1240571 V. Description of the invention (6) Output terminal 122a. Input port 146b in Figure 1 is electrically coupled to this low-resolution output terminal 122b. The signal frequency doubling device 14 also has an analog output port 142 and a digital output port 144. When the signal multiplier device 14 receives a video signal from one of the low-resolution output terminals (122a, 122b) of the controller 12, the low-resolution output terminal (122a or 122b), the signal is side-frequency The device 14 selectively performs a multiplication process on the received signal, so that the received signal conforms to one of a plurality of predetermined formats, for example, 720P. The signal multiplier device 14 will then output a video signal conforming to the predetermined format from the analog output port 142 and the digital output port 144. In particular, each of the high-resolution output terminals (122c, 122d) of the controller 12 is electrically coupled to the analog output port 142 and the digital output port of the signal multiplier 14 respectively. 144. That is, the high-resolution video signal output from the high-resolution output terminal (122c or 122d) of the controller 12 is output from the analog output port 142 or the digital output port 144, and does not need to be multiplied. ‘In a specific embodiment, the signal frequency doubling device 14 is controlled by a Request signal RS, and then performs frequency doubling processing on the received signal. The request signal can be input by a subscriber through a remote controller (not shown in Figure 1). That is, the user can input the request signal through the remote controller, and control the signal frequency multiplication processing device 14 to not perform frequency multiplication processing on the received signal, so that the low-resolution video signal can be directly output. In the following, the signal processing method of the digital television receiver 10 to which the first preferred embodiment of the present invention is applied will be described in detail, that is, the signal processing flow. Please refer

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Read the picture -'First 'execute step s2G. In step s2Q, the digital television receiver 10 receives a video signal from one of the plurality of video signal sources (20a2e). Then, step S22 is executed. In step S22, according to the transmission rate of the received video signal, frequency multiplication processing is selectively performed on the received video signal so that the received signal conforms to one of a plurality of predetermined formats. Finally, step S26 is executed. In step S26, the video signal that has been multiplied or the video signal that is received without being multiplied is at the analog output port and the digital output port.

Output. In this way, the video signal received from the video signal source is optimized and transmitted to the display. With the detailed description of the above preferred embodiments, it is hoped that the features and spirit of the present invention may be more clearly described, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various changes and equivalent arrangements within the scope of the present invention, patent scope. Therefore, the scope of patents applied for by the present invention: the scope should be interpreted in the broadest sense according to the above description, so that it covers all possible changes and arrangements with equality. . Guang

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V. Brief Description of the Drawings Figure 1 is a schematic depiction of a digital television receiver 10 according to the present invention. —Preferred Embodiment FIG. 1 shows a signal processing flow of a preferred visual receiver 10 to which the present invention is applied. Digital electricity of the embodiment 6. Description of the figure labels 1 0: Digital TV receiver 1 2: Waver 1 22a ~ 1 22d: Output terminal 1 24a ~ 1 24d

14: Signal frequency doubling device 142. Analog output port 144. Digital output ports 146a and 146b. Input ports 20a to 20e: Video signal source RS. Request signal S2 0-S26: Signal processing flow of digital TV receiver. A step of

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Claims (1)

1240571 6. Scope of patent application Scope of patent application 1. A digital television receiver (Digital television receiver) capable of adaptively processing (Adaptively) processing from one of a plurality of video signal sources (Video source) signal source), the digital television receiver includes: a controller (controller), the controller has a plurality of low-resolution output terminals and a plurality of high-resolution output terminals, the controller is used Receiving the video signal from the video signal source, and outputting the received signal from one of the plurality of low-resolution output terminals and the plurality of high-resolution output terminals according to the transmission rate of the received video signal; Video frequency signal; a signal frequency multiplying device (Frequency multiplying device), the signal frequency multiplying device is electrically coupled to a plurality of low-resolution output terminals of the controller, the signal frequency multiplying device has an analog output port and a Digital output port, when the signal multiplier device receives multiple low-resolution outputs from the controller When outputting the video signal at a low-resolution output terminal in the terminal, the signal multiplier device selectively performs frequency multiplication on the received signal, so that the received signal conforms to a plurality of predetermined formats. A predetermined format, the signal multiplier device then outputs the video signal conforming to the predetermined format from the analog output port and the digital output port; and wherein each of the high-resolution output terminals of the controller is high Page 13 1240571 6. Scope of Patent Application > The resolution output terminals are respectively electrically coupled to the analog output port and digital output port of the signal multiplier device. 2. The digital television receiver according to item 1 of the patent application scope, wherein the controller has a plurality of input terminals, and each of the plurality of input terminals cooperates to receive signals from the plurality of video signal sources. Some of the video signal sources. 3. The digital television receiver according to item 1 of the scope of patent application, wherein one of the display formats of the video signal received from the video signal source is selected from the group consisting of 480 1, 48OP, 1 080 1 and 720P ' One of the groups in a solid format. 4. The digital television receiver according to item 1 of the scope of patent application, wherein the plurality of predetermined display formats include one format selected from the group consisting of 10801 and 720P. 5. The digital television receiver described in item 1 of the scope of patent application, wherein the signal multiplication device is 'controlled' by a request signal and then performs multiplication processing on the received signal. The request signal is input by a subscriber. 6. A signal processing method for a digital television receiver (digital television receiver) from a plurality of video signal sources 1240571 6. The video signal received from one of the video signal sources in the patent application scope is subjected to adaptive processing. The method includes the following steps: receiving the video signal from the video signal source; according to the The transmission rate of the received video signal selectively performs frequency multiplication processing on the received video signal, so that the received signal conforms to one of a plurality of predetermined formats; the analog output and the digit At the port of rotation, the video signal that has been multiplied or the video signal that has been received without being multiplied is output. 7. The signal processing method according to item 6 of the patent application, wherein the controller has multiple input terminals, and each of the multiple input terminals cooperates to receive signals from the multiple video signal sources. Some video signal sources at the video signal source❶ 8. The signal processing method as described in item 6 of the patent application, wherein one of the display formats of the video signals received from the video signal source is selected from 4801, 48 OP, One format among a group of 10801 and 720P. 9. The signal processing method according to item 6 of the scope of patent application, wherein the plurality of predetermined display specifications include a format selected from the group consisting of 10801 and 720P.