KR19980020683A - Basic channel operation method of cable TV broadcasting (CATV) - Google Patents

Abstract

The present invention relates to a basic channel operating method of cable antenna TV (hereinafter, referred to as CATV), and more particularly, to a first process of classifying all broadcast channels that can be provided as basic channels into a plurality of channel groups, and A second process of setting a unique video mixing pattern per classified channel group, and each broadcasting channel constituting each of the channel groups classified in the first process is equally mixed based on the corresponding video mixing pattern set in the second process And a fourth process of transmitting the mixed video data through the cable through a third process and a third process, and a CATV broadcast providing a basic channel transmission method and a reception method according to the fixed television broadcast. When operating, it can operate with less secret information, and it has the effect of enabling viewers to selectively view with less viewership. All.

In addition, since the viewer selects a desired channel group and watches only the broadcasts included therein, the viewer needs only information about one or two non-keys that he or she wishes to watch.

Description

Basic channel operation method of cable TV broadcasting (CATV)

1 is an exemplary diagram for explaining a secretion method of a basic channel of a conventional CATV broadcasting station.

2 is an exemplary diagram for explaining a secretion method of a basic channel according to the present invention.

* Description of the symbols for the main parts of the drawings *

10A to 10N: Admixture 20A to 20N: Modulator

ADD: Mixer 30: Control unit

100A to 100N: Channel group mixing unit

The present invention relates to a basic channel operating method of cable antenna TV (hereinafter, referred to as CATV). In particular, a plurality of basic channels that are basically provided to a CATV subscriber can be formed into a plurality of channel groups, which the subscriber desires. The present invention relates to a method for operating a basic channel of a cable TV broadcast to add a small fee to a group.

In general, broadcasts provided by CATV are largely divided into non-channels for transmitting a mixed broadcast through a mixer and an airwave channel for transmitting without a mixer.

In this case, the non-description channel is a broadcast that charges a specific viewing fee, which can be classified as follows. A paid channel for collectively collecting a corresponding specific fee allocated to a specific channel, and unlike the euro channel, Pay per view (PPV), which selects the channel at its own will and pays only for the program or time watched, and the basic channel for paying only a certain fee when subscribing to the cable broadcasting service. do.

Referring to FIG. 1, which is attached to the basic channel secretion method of a CATV broadcasting station for supplying the basic channel to the subscriber, the channel is mixed or secreted through the mixers 10A to 10N for each channel of the basic channel. And modulated in the modulators 20A to 20N. The video signal of each modulated channel is formed into one transmission signal group through a mixer (ADD) and transmitted to subscribers through a transmission cable.

At this time, the communication control unit 30 provides different talk keys SK1 to SKN to each of the mixers 10A to 10N so that each channel is mixed in a unique pattern.

Accordingly, the key required for decryption on the user side is proportional to the number of channels provided by the basic channel, and one key is 5 bytes in total, 1 byte of tag signal and 4 bytes of pnkey code. Information is required. In other words, in order to clear the entire basic channel, information of the number of channels x 6 bytes (channel tag pnkey 4 bytes) is required, and a large amount of information is required at the same time since all information is recorded in all converters.

Therefore, the amount of decryption information required to decrypt all the channels provided by the base channel is required, which means that the storage capacity of each converter (EEPROM) can store up to 32 secret information. This is because the current limit of technology is 32.

However, this requirement has the disadvantage of not considering the capacity of each converter.

In addition, since the cost of the basic channel provided by CATV broadcasting is still higher than that of general cable broadcasting (broadcasting only the airwave broadcasting to solve the astigmatism area of public broadcasting), subscribers of CATV broadcasting are generally cable broadcasting. Less reality than subscribers.

In addition, users often complain about the fact that users do not have to watch all the basic channels that provide 32 broadcasts, but have to pay for the 32 channels despite watching only a few fixed programs according to taste. The problem arises.

An object of the present invention for solving the above problems is to form a plurality of channel groups provided to the base channel provided to CATV subscribers and to assign a single key to each group to reduce the number of storage of the converter on the subscriber side The present invention relates to a method of operating a basic channel of cable TV broadcasting so that a user can add a predetermined viewing fee to only one desired group.

A feature of the present invention for achieving the above object is, in the basic channel transmission method in a wired television broadcasting, the first process of classifying all broadcast channels that can be provided as a basic channel into a plurality of channel groups, and is classified in the above process A second step of setting a unique video mixing pattern per channel group, and a third step of equalizing each broadcasting channel constituting each channel group classified in the first step based on the corresponding video mixing pattern set in the second step And a fourth process of transmitting the mixed image data through the cable through the third process.

Another feature of the present invention for achieving the above object is the reception of the subscriber side in a transmission scheme having one unique secretion pattern for each channel group forming a broadcast channel constituting a basic channel of the wired television broadcasting as a plurality of channel groups In the method, the subscriber side selects any one or two of the channel group that the user wants to watch, and stores the release key code for deactivating the channel group in his converting, and the release key code stored through the above process. It includes the process of restoring the broadcast channel included in the channel group through the same pattern.

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

FIG. 2 is an exemplary diagram for explaining a secretion method of a basic channel according to the present invention, and intends to divide the basic channel among CATV broadcasts into several groups.

First, the broadcaster classifies all broadcast channels that can be provided as basic channels into a plurality of channel groups. In this case, a specific broadcast channel (for example, movie music, news channel, etc.) may be overlapped in a plurality of channel groups, and the classification of the broadcast channel may be arbitrarily set in the transmission side.

Then, as described above, in each channel group classified into a plurality of channel groups, a plurality of channel groups are respectively input to the mixing units 100A to 100N, and each of the channel group mixing units 100A to 100N has one secretary. The keys SK1 to SKN are provided.

At this time, in each channel group mixing unit 100A to 100N, a plurality of mixers for mixing broadcast channels classified into the corresponding channel group are provided, and each mixer included in the same channel group mixing unit 100A to 100N is provided. Since the same secret key is input, the input image is mixed with the same pattern and transmitted to the transmitting side.

In other words, the channels preferred by the viewers are grouped into several channel groups, and the video is mixed with one unique secret key per channel group to prevent illegal viewing.

Accordingly, a plurality of channels included in the channel group are all mixed in the same way, and the subscriber side selects only one or two channel groups that he wants to watch and releases the channel group in the converter to deactivate the channel group. You just need to store the key code.

When providing a basic channel operating room of the cable TV broadcasting (CATV) according to the present invention as described above, it can be operated with less secret information than when operating the CATV broadcasting, allowing viewers to selectively view at a lower viewer rating It is effective.

In addition, since the user selects a desired channel group and watches only the broadcasts included therein, the user only needs to know information about one or two non-keys that he or she wishes to watch.

Claims (4)

In the basic channel transmission method in wired television broadcasting, A first step of classifying all broadcast channels that can be provided as basic channels into a plurality of channel groups; A second step of setting a unique image mixing pattern per channel group classified in the above step; A third step of mixing each broadcast channel constituting each of the channel groups classified in the first step in the same manner based on the corresponding video mixing pattern set in the second step; And And a fourth process of transmitting the mixed video data through the cable through a third process. The method of claim 1, In the first process, when all broadcast channels are classified into a plurality of channel groups, a specific broadcast channel is overlapped with a plurality of channel groups. In the first step, the classification of the broadcasting channel constituting each channel group can be arbitrarily set at the transmitting side. In the receiving method of the subscriber side in a transmission method in which a broadcast channel constituting a basic channel of a wired television broadcast is formed into a plurality of channel groups and each channel group has one unique secret pattern, At the subscriber side, selecting one or two of the channel groups desired to be watched, and storing a release key code for deactivating the corresponding channel group in its converter; And recovering the broadcast channel included in the corresponding channel group in the same pattern through the stored release key code.