KR20010082760A - Multi Purpose Cable TV Decoder System - Google Patents

Abstract

PURPOSE: A multipurpose cable TV decoder system is provided to perform a perfect bidirectional communication and a variety of supplementary communication by composing a variable loop of a plurality of frequency and processing a frequency for data communication between a host computer of broadcasting station and a terminal for member. CONSTITUTION: A duplex unit(12) separates data from a broadcasting program. A digital tuner(13) tunes the broadcasting program. A descrambler unit(14) descrambles the scrambled program. An output unit(15) for digital TV receiver outputs the program to a digital TV receiver. A conversion unit(16) converts the descrambled digital broadcasting program into an analog broadcasting program. An output unit(17) for analog TV receiver outputs the converted analog broadcasting program to an analog TV receiver.

Description

Multi Purpose Cable TV Decoder System

The present invention provides a multi-purpose decoder system which 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 one decoder in a cable TV reception decoder. Multi-channel loop communication method between host computer of broadcasting station and decoder for each subscriber provides two-way data communication without communication obstacles, and it is decoder for cable TV and additional communication business such as e-commerce, public opinion poll and security system, and Internet PC. Provides a system that can be connected to.

The conventional cable TV reception decoder (also called a converter or set-dambox) 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 in that the TV receiver and the analog TV receiver could not be combined to satisfy. Also, the conventional decoder for receiving a cable TV only receives programs broadcast through a cable TV network, and it is inconvenient for a user because a multimedia device such as a DVD, VCR, CD, satellite TV, CDP can be directly connected to a TV and received on a 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 two-way data communication between the cable TV reception decoder and the host computer of the broadcasting station has a fixed up and down frequency, so that the signal structure (Signal Ingress) and noise occurs when the fixed up and down frequency is fixed. There was a problem that the network is broken.

In order to solve the above problems, the present invention provides a combined function capable of receiving not only a digital TV receiver but also an analog TV receiver as one cable TV receiver decoder, and a DVD, LPD, It provides a multi-purpose decoder system that connects multimedia devices such as VCRs, and a variable loop for variable data communication frequency between the host computer of a broadcasting station and each subscriber terminal to operate a perfect two-way communication network for communication failure. By providing a technology that can be connected to the cable TV decoder provides a variety of additional communication functions and technology that can be connected to the PC for the Internet to operate.

1 is a system block diagram of the present invention;

[Description of Symbols for Main Parts of Drawing]

10: central processing unit

11: transmission data connection means

12: duplex filter means

13: duner 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 PCC means for reception frequency

24 PCC 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 for achieving the above object.

1 is a system block diagram of the present invention.

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

The data signal transmitted to the line of the cable TV network includes a receiving device means 21 for receiving the data signal separated by the duplex filter means 12, a PCC means 23 for changing the frequency of the receiving device means, and a decoder. A transmission device means (22) for transmitting a data signal to a host computer of a broadcasting station and a PCC means (24) for changing a frequency in the DVD. On C. 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 is composed of a PC connection means 41, a receiving apparatus means 21 for receiving Internet data, and a transmitting apparatus 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 cable of the cable TV only is separated into an A / V signal and a data signal by the duplex filter means 12, and the A / V signal is tuned by the tuner means 13 to the digital TV by 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 digital TV.

The signal received by the analog TV is restored to a signal that can be received by the descrambler means 14 and then converted into an analog signal by the converting means 16 for converting the digital signal into an analog signal and then analogue. It is output to the analog TV via the TV output terminal 17, 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. Then, the function of the decoder is controlled to perform an additional communication function.

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 PCC circuit is configured in the transmitting device means 22 and the receiving device means 21, and the host computer of the broadcasting station is also programmed as necessary if the frequency at the time of use is programmed in advance in the host computer. 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, a noise automatic monitoring means is added to the host computer, and the 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 an 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 reprogrammed. When signal intrusion or noise occurs at the third frequency, the first is changed to frequency again. 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 PCC circuit configures the frequency of the receiving device means 21 and the frequency of the transmitting device means 22 into one PCC to simultaneously change the transmission / reception frequency, or configure the PCC (23.24) to separate the receiving frequency from the transmission frequency. It can also be configured to change.

Since the problem of the 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 Internet PC is added to the decoder of the present invention, so that the Internet can be connected without a separate cable modem. It can be connected and operated through a cable TV network, and a decoder for receiving a cable TV as well as a PC through a cable TV network. Capital. Various additional communication businesses such as remote measurement of gas and the like can be implemented. In addition, a plurality of input means 31-1, 31-2, ... 31-N are provided on the A / V switcher means 31 attached to the decoder of the present invention, and DVD, VCR, LDP, CD, karaoke, etc. When the A / V output is connected, the user selects the multimedia device to be output to the TV by the remote control means of the decoder, and the central processing unit 10 recognizes the control unit 31 to control the demonstrator means 31 of the multimedia device selected by the projector. By switching input 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 technology capable of receiving a broadcast program on a digital TV or an analog TV as a single cable TV receiving decoder, and connecting various multimedia devices to the cable TV receiving decoder to receive the TV receiver. By providing the technology that can be used and the two-way data communication network between the broadcasting station's host computer and each subscriber's decoder by the line of the cable TV network, the technology can maintain the communication without disconnection by signal intrusion or noise. The present invention provides a technology capable of connecting and operating a PC, 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 changing 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 the N multimedia apparatuses; (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 receiving device 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) A decoder system for multi-purpose cable TV reception, comprising a central processing unit for centrally controlling the above means. The method according to claim 1, The PCC means is added to the data receiver means and the data transmitter means, and the N up and down frequencies to be operated as PCC circuits are preset and memoryd by the host computer of the broadcasting station. It detects and changes to the second frequency, so if a signal intrusion or noise occurs in the second frequency, it changes the Nth order to the third frequency and circulates from the Nth frequency to the first frequency, and the up-and-down frequency is changed. A decoder system for multi-purpose cable TV reception, comprising a transmitting and receiving 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 to 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 switcher 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.