KR19990021182A - Digital broadcast receiver that modularizes analog system - Google Patents

Abstract

The present disclosure relates to a digital broadcast receiver that modularizes an analog system that allows a user to select whether or not to mount the analog broadcast processor to increase the compatibility of the digital broadcast receiver. When the user selects the analog system module, the apparatus of the present invention comprises an analog signal processor having one-to-one correspondence with the analog signal processor in the same configuration of the digital broadcast receiver and is included in the component block of the digital signal processor that is already embedded in the set. And an A / V switching unit for selecting one of the broadcast signal received by the broadcast signal received by the analog signal processing unit arbitrarily mounted. In addition, it is composed of a host processor for controlling the analog signal processing unit, and overall control of each component. Therefore, the present invention is more preferable because the user can selectively install the analog broadcasting system module at the time of purchase of the digital broadcasting receiver, thereby increasing the user's satisfaction and reducing the cost of unnecessary work and installation.

Description

Digital broadcast receiver that modularizes analog system

The present invention relates to a digital broadcast receiving apparatus, and more particularly, to a digital broadcast receiving apparatus in which an analog system for modularizing an analog broadcast processing unit for enhancing compatibility of a digital broadcast receiving apparatus and allowing a user to select whether to mount it. It is about.

In accordance with the recent digital trend, high definition (HD) digital broadcasting will soon begin. Accordingly, there has been a demand for a TV system capable of receiving and viewing digital broadcasts. In this regard, prior arts related to digital TV systems for maintaining compatibility with conventional analog broadcast methods have been proposed. One example is shown in FIG.

1 is a block diagram of a general digital broadcast receiver. The apparatus shown in FIG. 1 tunes a broadcast signal among signals flowing through an antenna and outputs the tuner 11 as an intermediate frequency (hereinafter, referred to as IF) signal, and the SAW for filtering the IF signal output from the tuner 11. The filter 12 is provided. In addition, a digital signal processor 13 for processing a digital broadcast signal from among IF signals and receiving a digital broadcast signal from among the IF signals is output to the SAW filter 12, and a signal signal is processed for viewing and receiving an analog broadcast signal. The analog signal processor 14 is connected. The digital signal processor 13 includes an IF unit 131 for receiving an IF signal output from the SAW filter 12 and processing the signal, and an A / D converter 132 for converting the IF signal into a digital form. At the output of the D converter 132, a channel decoder 133 demodulates the digitally converted signal to a state before it is modulated, and a T / S decoder 134 that separates video, audio, and other data from the demodulated signal. Is connected. Meanwhile, the analog signal processor 14 receives an IF signal output from the SAW filter 12 and receives an IF signal 141 and an external input input through an analog broadcast signal and an external connection terminal of the IF unit 141. An A / V switching unit 142 for selecting one of the signals is connected, and at the output terminal of the A / V switching unit 142, a chroma 143 for converting the selected analog signal into a luminance signal and two color difference signals, An A / D converter 144 for converting two color difference signals into a digital form is connected. The output terminal 15 of each digital and analog signal processor 13 and 14 is connected to an output unit 15 for outputting image, audio, and other data which have been processed through a predetermined process, and controls overall operations of each component. The host processor 16 is provided.

Since a technique for a digital broadcast receiver having compatibility with the digital and analog broadcast schemes configured as described above has been known, the operation of each component will be described schematically.

1, the tuner 11 tunes a desired broadcast signal from a signal flowing through an antenna and outputs an IF signal. The SAW filter 12 receives and filters the IF signal and outputs the IF signal to the digital signal processor 13 if the IF signal is a digital broadcast signal, and to the analog signal processor 14 if the IF signal is an analog broadcast signal. In the digital signal processor 13, the IF unit 131 processes the IF signal received from the SAW filter 12 and outputs the signal to the A / D converter 132. The A / D converter 132 converts the applied IF signal into a digital form and outputs it to the channel decoder 133. The channel decoder 133 performs channel decoding on the digitally converted broadcast signal and demodulates it to a state before being modulated. Since a digital broadcast signal is usually modulated and transmitted by a residual sideband (VSB) from a broadcasting station, the channel decoder 133 demodulates the VSB modulation. The T / S decoder 134 separates the video, audio, and other data multiplexed into the demodulated broadcast signal and outputs it to the output unit 15. The output unit 15 outputs the received signals in a conventional manner under the control of the host processor 16. On the other hand, in the analog signal processor 14, the IF unit 141 signals the IF signal received from the SAW filter 12. The A / V switching unit 142 selects one of an IF broadcast analog broadcast signal and an external input signal input through an external connection terminal and outputs it to the chroma 143 under the control of the host processor 16. The chroma 143 receiving the analog broadcast signal selected by the A / V switching unit 142 converts the luminance signal and the two color difference signals and outputs the same to the A / D converter 144. The A / D converter 144 converts the converted luminance signal and the two color difference signals into digital form and outputs them to the output unit 15. The output unit 15 outputs the received signals in a conventional manner under the control of the host processor 16.

However, the digital broadcasting receiver having the above compatibility has a problem in that an unnecessary analog broadcasting system is mounted when the digital broadcasting method is settled and the analog broadcasting method is terminated.

Accordingly, an object of the present invention is to provide a digital broadcast receiving apparatus in which an analog system is modularized so that an analog broadcast system module can be installed according to a user's selection.

1 is a block diagram showing a general digital broadcasting receiver;

2 is a block diagram showing a digital broadcast receiving apparatus modularized analog system according to a preferred embodiment of the present invention.

Explanation of symbols for main parts of the drawings

21: tuner 22: SAW filter

23: host processor 24: analog signal processing unit

241: IF unit 242: A / V switching unit

243: chroma 244: A / D conversion unit

25: A / V switching unit 26: output unit

In order to achieve the above object, a digital broadcasting receiver modularizing an analog system according to the present invention is detachable to the digital broadcasting receiver, and an analog signal processor for processing a received analog broadcast signal and applying the signal to an A / V switching unit. And a host processor for controlling the receiving device according to a user's request, a tuner for outputting an IF signal by selecting one of a digital and analog broadcasting method based on a control signal of the host processor, and a tuner inputted from a tuner. Any of the signals input from the two signal processing units based on the control signal of the host processor connected to the output signal of the digital signal processing unit and the analog signal processing unit SAW filter to filter the IF signal to output to any one of the digital signal processing unit and the analog signal processing unit. A / V switch for outputting signal to output part And an output unit for outputting an output signal of the A / V switching unit.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing a digital broadcast receiving apparatus modularized analog system according to a preferred embodiment of the present invention. As shown, when the user selects the analog system module, in the same configuration of the digital broadcasting receiver of FIG. 1, the analog signal processing unit 24 having each configuration corresponding to one-to-one correspondence with the analog signal processing unit 14 is configured and is already in the set. An A / V switching unit 25 for selecting one of the broadcast signal received by the built-in digital signal processing block and the broadcast signal received by the arbitrarily mounted analog signal processing unit 24 is further configured. In addition, it is composed of a host processor 23 that controls the analog signal processor 24, and controls the overall configuration. The components of FIG. 2 having the same reference numerals as in FIG. 1 perform the same functions as the corresponding components of FIG. 1, and thus a detailed description thereof will be omitted.

In FIG. 2, when a user wants to receive both digital and analog broadcasting methods, the user installs the analog broadcasting system module in the digital broadcasting receiver when purchasing the product. The tuner 21 tunes a desired broadcast signal from a signal flowing through the antenna and outputs an IF signal. The SAW filter 22 receives and filters the IF signal and outputs the IF signal to the digital signal processor (not shown) if the IF signal is a digital broadcast signal, and to the analog signal processor 24 if it is an analog signal. If the input broadcast method is digital, the same configuration in the digital signal processing unit performs the same operation as that of the digital signal processing unit 13 shown in FIG. 1, and thus, a detailed description thereof will be omitted. The final component is output from the T / S decoder. The digital signal is input to the A / V switching unit 25. At this time, the control signal is received from the host processor 23, the A / V switching unit 25 is switched with the output terminal of the T / S decoder 134. Accordingly, the A / V switching unit 25 outputs the T / S decoder 134 and the switched digital broadcast signal to the output unit 26, and the output unit 26 performs audio and video through a predetermined process. Output On the other hand, if the IF signal output from the SAW filter 22 is an analog broadcast method, it is input to the analog signal processor 24. At this time, the analog signal processing unit 24 has the same configuration as the analog signal processing unit 14 shown in FIG. 1, and converts the digital signal to the digital signal by the A / D conversion unit 244 through the same operation. The digital signal from the analog signal processing section 24 is input to the A / V switching section 25. At this time, the control signal is received from the host processor 23, the A / V switching unit 25 is switched with the output terminal of the A / D conversion unit 244 in the analog signal processing unit 24. Accordingly, the A / V switching unit 25 outputs the A / D converter 244 and the switched digital broadcast signal to the output unit 26, and the output unit 26 performs audio and video through a predetermined process. Print each. Therefore, through the module of the analog broadcasting system installed according to the user's selection, the user can watch digital and analog broadcasting in one digital broadcasting receiver, and if the user does not want to install the analog broadcasting system module (that is, digital broadcasting) You do not need to purchase analog broadcasting system module separately.

As described above, the present invention is more preferable because the user can selectively install the analog broadcasting system module at the time of purchase of the digital broadcasting receiver, increasing the user's satisfaction and reducing the cost of unnecessary work and installation.

Claims (1)

In the digital broadcast receiver for processing and outputting a digital signal in the digital signal processor, An analog signal processor detachable from the digital broadcast receiver and processing the received analog broadcast signal to an A / V switching unit; A host processor controlling the receiving device according to a user's request; A tuner which selects one of the digital and analog broadcast signals and outputs an IF signal based on the control signal of the host processor; An SAW filter which filters the IF signal input from the tuner and outputs the signal to one of the digital signal processor and the analog signal processor; An A / V switching unit connected to an output terminal of the digital signal processing unit and the analog signal processing unit and outputting any one signal from two signal processing units to an output unit based on a control signal of a host processor; And And an output unit for outputting an output signal of the A / V switching unit.