KR200189549Y1 - Multi purpose cable tv decoder system - Google Patents

Abstract

The present invention provides a decoder system for receiving a cable TV broadcast through a cable TV network, a multi-purpose cable TV receiver decoder for performing digital TV broadcast reception functions, analog TV broadcast reception functions and a plurality of multimedia devices. By providing a loop frequency variable communication technology consisting of a plurality of frequencies for the two-way data communication means between the host computer of the broadcasting station and the decoder for each subscriber, the cable TV decoder can be operated by connecting various additional communication businesses and the Internet PC. Provide a system.

Description

Multi Purpose Cable TV Decoder System

The present invention provides a multi-purpose decoder system that realizes both a digital TV broadcast reception function, an analog TV broadcast reception function, a reception function of a plurality of multimedia devices, and a PC connection function as a decoder in a cable TV reception decoder. Multi-channel loop communication method between the host computer and the decoder for each subscriber provides two-way data communication without any communication obstacles, thereby providing additional communication business such as electronic commerce, public opinion polls and security systems, and Internet PCs. Provides a system that can be connected.

The conventional decoder for cable TV reception (also called a converter or set-top box) does not have the function of receiving only one type of TV broadcast standard program. In other words, the decoder designed to receive analog TV broadcast programs can only receive analog broadcast programs, and the decoder designed to receive digital TV broadcast programs can only receive digital TV. There was a problem that can not satisfy both the and analog TV receiver.

In addition, the conventional cable TV reception decoder only receives programs broadcast through the cable TV network, and it is inconvenient for users because it can receive multimedia devices such as DVD, VCR, CD, satellite TV, and LDP directly by connecting them to the TV. There was a problem.

In addition, when trying to access the Internet by using the signal of the cable TV network, a separate cable modem must be installed, and there was a problem in that the cable TV decoder can not be used as an Internet connection.

In addition, the conventional decoder for cable TV reception has a technology structure in which one up and down frequency for two-way data communication between a host computer and a decoder of a broadcasting station is fixed and operated. Therefore, when signal ingress and noise occur at a fixed up and down frequency, There was a problem that the data network is broken.

In order to solve the above problems, the present invention provides a single cable TV receiver decoder that can be used as a digital TV receiver as well as an analog TV receiver. It provides a multi-purpose decoder system for connecting multimedia devices, etc., and it is possible to operate a perfect two-way communication network to cope with communication failure by forming a variable loop with a plurality of frequencies for data communication frequency between a broadcasting station's host computer and each subscriber terminal. By providing the existing technology, the cable TV decoder provides a variety of additional communication functions and technologies for connecting and operating a PC for the Internet.

1 is a system block diagram of the present invention

[Description of Code for Major Parts of Drawing]

10: central processing unit

11: transmission data connection means

12: duplex filter means

13: tuner means

14 descrambler means

15: digital TV output terminal

16: signal conversion means

17: analog TV output terminal

18: data memory means

20: communication modem unit

21: receiving device means

22 transmission device means

23: PLL means for reception frequency

24: PLL means for transmission frequency

30: multimedia connection

31: A / V switch means

31-1 to 31-N: Multimedia known A / V signal input terminal

41: PC connection means

42: PC

Hereinafter, with reference to the accompanying drawings will be described the system configuration of the present invention and its effects and effects to achieve the above object.

1 is a system block diagram of the present invention.

As shown in Fig. 1, the present invention provides a duplex filter means 12 for separating broadcast programs and data input to a line in a cable TV room, a digital tuner means 15 for tuning broadcast programs, and a scrambled received program. Descrambler means 14 for descrambling, digital output receiver output means 15 for outputting to a digital TV receiver, converting means 16 for converting descrambled digital broadcast programs to analog and analog converted And analog output unit 17 for outputting a broadcast program to an analog TV receiver.

The data signal transmitted to the line of the cable TV network includes a receiving device means 21 for receiving a data signal separated by the duplex filter means 12, a PLL means 23 for changing the frequency of the receiving device means, and a decoder. A transmitting device means (22) for transmitting a data signal to a host computer of a broadcasting station, and a PLL means (24) for changing the frequency, wherein the DVD. On CD. Means for connecting video and audio signals transmitted from multimedia devices such as VCRs to TV receivers are the A / V output terminals 31-1, 31-2, 31-3 ... 31-N of each multimedia device. The A / V signal input to the output terminal is composed of switcher means 31 for switching to a TV receiver.

The means for connecting the Internet by the line of the cable TV network consists of a PC connection means 41, a receiver means 21 for receiving Internet data, and a transmitter means 22 for transmitting Internet data. The system is composed of a central processing unit 10 for central control.

Referring to the operation and effects of the present invention configured as described above are as follows.

First, the TV broadcast program reception function,

The signal input to the line of the cable TV network is separated into an A / V signal and a data signal in the duplex filter means 12, and the A / V signal is tuned in the tuner means 13 to the digital TV from the descrambler means 14. The signal is restored to a signal that can be received and output to the digital TV through the output terminal 15 for the digital TV.

The signal received by the analog TV is recovered by the descrambler means 14 into a signal that can be received by the digital TV and then converted into an analog signal by the converter means 16 for converting the digital signal into an analog signal and then output terminal for the analog TV. Through 17, it is output to an analog TV and can be received by the analog TV. In addition, the data signal transmitted from the host computer of the broadcasting station by the line of the cable TV network is separated from the duplex filter means 12 and input to the data receiving means 21, and the received data signal is transmitted to the central processing unit 10 The additional function of the decoder is controlled by controlling the function of the decoder.

The data signal to be transmitted by the central processing unit 10 of the decoder to the host computer of the broadcasting station is transmitted to the host computer via the data transmission device means 22 on the line of the cable TV network, and uses a conventional transmission technique as a transmission / reception method.

In the present invention, however, the PLL circuits are configured in the transmitter means 22 and the receiver means 21 respectively (23.24), and the transmitter apparatus means are transmitted to the host computer of the broadcasting station as necessary in advance by programming the host frequency for transmission and reception ( 22) and the frequency of the receiving device means 21 can be changed, and when the signal intrusion or data communication is disturbed in the cable TV network, it can be changed to the transmission / reception frequency without noise to the host computer. In this case, noise automatic monitoring means is added to the host computer, and up and down frequencies are pre-memorized in a plurality of frequencies in the host computer to form a down loop with a plurality of down frequencies and a up loop with a plurality of up frequencies, If a host computer detects noise or signal intrusion, the host computer detects it and automatically changes the up and down frequencies of the host computer and the up and down frequencies of each decoder on the communication line to a frequency free of second noise or signal intrusion on the computer. When noise or signal intrusion occurs again at one second up and down frequency, it is automatically changed to another third frequency that is programmed again. When signal intrusion or noise occurs at the third frequency, the first is changed back to frequency. Communication lines always communicate data at frequencies free from noise and signal intrusion It is possible to maintain.

The host computer constructs a loop with N up and down frequencies, for example, if the loop consists of three frequencies, it communicates with the first frequency, changes to the second frequency, goes from the second to the control, and goes from the third to the first, in the form of a loop. There are features that change. The PLL circuit configures the frequency of the receiving device means 21 and the frequency of the transmitting device means 22 into one PLL to simultaneously change the transmission / reception frequency or configure the PLL (23.24) to separate the receiving frequency from the transmission frequency. It can also be configured to change.

Since the problem of data communication failure between the host computer of the broadcasting station and the decoder for each subscriber is solved by the above method and configuration, the connection means 41 of the PC for the Internet is added to the decoder of the present invention, so that the decoder modem without a separate cable modem is added. (20) It is possible to operate the Internet by connecting the PC to the PC, and through the cable TV network as well as the PC and the cable TV receiver decoder for electronic commerce, electronic polling, electronic security system, electricity, water, gas, etc. Various additional communication businesses such as measurement can be implemented.

In addition, a plurality of input means 31-1, 31-2, ... 31-N are formed on the A / V switcher means 31 attached to the decoder of the present invention, and DVD, VCR, LDP, CD, karaoke, etc. Connected to the A / V output and the user selects the multimedia device to be output to the TV by the remote control means of the decoder, the central processing unit 10 that recognizes this control the switcher means 31 to input the multimedia device selected by the user By switching data and outputting it to a TV receiver, a user can conveniently use various multimedia devices as a cable TV decoder.

As described above, the present invention provides a single cable TV receiving decoder that can receive a broadcast program on a digital TV or an analog TV, and connects various multimedia devices to the cable TV receiving decoder to receive a TV receiver. By providing a multi-channel loop frequency variable technology that can maintain communication without disconnection of signal intrusion or noise between the host computer of the broadcasting station and the decoder for each subscriber by the cable TV network. The present invention provides a technology capable of connecting and operating a PC for the Internet as a reception decoder and a multipurpose decoder system capable of performing various additional communication projects as a decoder.

Claims (7)

In the decoder for cable TV reception, (1) digital TV signal processing means for receiving and transmitting a digital TV signal to the digital TV; (2) signal conversion means for converting the digital TV signal into an analog TV signal so that the digital TV signal can be received by the analog TV; (3) N multimedia signal connection means for connecting A / V signals of N multimedia devices; (4) switcher means for selecting and outputting the A / V signals of the N multimedia devices to a TV; (5) filter means for separating the data signal for data communication from the broadcast signal received by the line of the cable TV network; (6) data signal receiver means for receiving a data signal separated by the filter means; (7) data signal transmitting device means for transmitting a data signal from the decoder to the host computer; (8) PC connection means for connecting the Internet with data signals transmitted and received through the cable TV network; (9) characterized by consisting of a central processing unit for central control of each of the above means A decoder system for multi-purpose cable TV reception. The method according to claim 1, When the PLL means is added to the data receiving device means and the data transmitting device means, N up and down frequencies to be operated by the PLL circuit are preset and stored in the host computer of the broadcasting station, and the host computer generates a signal intrusion or noise on the communication line. It detects this and changes it to the second frequency. When signal intrusion or noise occurs in the second frequency, the N-type is changed to the third frequency, and the N-frequency cycles back to the first frequency, and the up-and-down frequency is changed. A decoder system for multi-purpose cable TV reception, comprising data transmission and reception means. The method according to claim 1, A decoder system for multi-purpose cable TV reception, comprising eliminating signal conversion means for converting a digital TV signal into an analog TV signal. The method according to claim 1, A decoder system for multi-purpose cable TV reception, wherein the multimedia device connection means and the switcher means are removed. The method according to claim 1, A decoder system for multi-purpose cable TV reception, wherein the PC connection means is removed. The method according to claim 1, A decoder system for multi-purpose cable TV reception, wherein the multimedia device connection means, the switch means and the PC connection means are removed. The method according to claim 1, A decoder system for cable TV reception, characterized in that a PC dedicated data transmission and reception means for separately connecting a PC to a cable TV network is provided.