JPH05328345A - Pay broadcast receiver - Google Patents

Abstract

PURPOSE:To reduce power cosumption by preparing a power supply to a part to be required for upating independently of a power supply to other devices, and after updating all channels to be updated, turning off the power other than the power supply necessary for updating. CONSTITUTION:A power supply 21 supplies power to an image output device 13, a sound output device 14 and a display part 23 and a power supply 22 supplies power to blocks other than the blocks receiving power from the power supply 21. In a stand-by state, a control part 20 turns off the power supply 21 and allows a broadcasting station indicating 'YES' for a supplied individual packet existence signal 17 to select a tuner 11. An ID number comparator 18 compares the ID number of the supplied individual information with an ID number written in a ROM 19, and when both the ID numbers coincide with each other, the control part 20 writes necessary contract information in the ROM 19. Thereby even when a listener does not use a receiver, the individual information of all pay broadcast can be efficiently received, updating processing can quickly be executed and power consumption can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver for receiving a television or the like, and more particularly to a pay broadcast receiver for receiving individual contract information multiplexed in a program signal and sent in the form of a data packet.

[0002]

2. Description of the Related Art Currently, Japanese satellite broadcasting (JSB) is performing pay broadcasting using a broadcasting satellite BS-3. This pay broadcasting uses the scramble of the core tech system, and this core tech system is based on the telecommunications technology advisory advisory number 17
No. "Conditions on conditional access technology research," issued in March 1991, in accordance with No. "Technical conditions for pay system in television broadcasting by broadcasting satellite" (March 1984). It is explained in the “Research and Development Comprehensive Report”.

In this pay broadcasting, the related information transmitted in a multiplexed form with the program signal is in the form of a 288-bit packet and 32 [K] of 2048 [Kbps] audio data.
bps], and several types of packets are transmitted. About 9 [m] to send 1 packet
[s] is required, and the number of individual information packets among the packets to be transmitted occupies the majority.
It is possible to transmit millions of packets of individual information.

FIG. 3 is a diagram showing a packet of individual information among the several types of transmitted packets. In FIG. 3, the main part including the alteration detection 41 is encrypted with the individual master key Km. The decoder identification number 45 (hereinafter referred to as ID number 45) indicates a so-called address indicating to which decoder the individual information is sent. Each decoder compares the transmitted ID number 45 with the ID that the decoder itself has in advance, and obtains information addressed to each decoder itself. The station identification code 42 indicates the business operator. The work key 44 and expiration date 43 of this individual information
Is to be changed with a certain deadline, so the transmitting side must periodically distribute it to each decoder.

As of April 1992, the number of JSB subscribers is approximately 800,000, and the number of subscribers who need to be renewed in one month is 150,000. The time required to transmit 150,000 individual information packets that require this update (hereinafter referred to as the individual packet transmission cycle) is approximately 300,000 individual packets per hour as shown above. It is about 30 minutes since the information packet can be transmitted, and the individual packet transmission cycle is about 30 minutes. And JSB will give JSB at least 30 minutes to the person who is updated during the update period.
Corresponding by telling them to see. However, it is speculated that there are complaints that some cases have not been updated every month.

Also, if the number of subscribers remains the same, the individual packet transmission cycle will be about 30 minutes, but if the number of subscribers and the number of pay broadcasting stations increase ten times in the near future, the individual packet transmission cycle will increase. The transmission cycle is about 50 hours. It is very wasteful to energize the decoder continuously for about 50 hours, which is a safety problem. As described above, in the conventional updating method, since it is necessary to continuously energize the decoder, power is wasted and there is a safety problem.

[0007]

As described above, in the conventional pay broadcasting receiver, when the number of subscribers or pay broadcasting stations increases, the individual packet transmission cycle becomes very long and the decoder which needs to be updated. Had a problem that it was necessary to continuously energize for this time. In addition, there is a safety problem because the power is kept on for a long time. The present invention eliminates the above-mentioned drawbacks of the prior art, shortens the time for energizing, and reduces power consumption by turning off the power of parts other than those required for updating, and also reduces the power consumption from multiple pay broadcasting stations. The purpose is to efficiently receive individual information.

[0008]

In order to achieve the above object, according to the present invention, an input terminal to which individual information including an individual ID number and contract information is input by being multiplexed with a video (or audio) signal. A channel selection means for selecting a signal from the input terminal; a demodulation means for demodulating the video (or the audio) signal from the output of the channel selection means; and an output device for outputting the demodulated signal. An individual information extraction unit that extracts the individual information from the output of the channel selection unit, an ID extraction unit that extracts an ID number from the extracted individual information, and a memory that stores the contract content with the broadcasting station. , I
The ID memory storing the D number, the comparing means for comparing the output of the ID memory with the output of the ID extracting means, and the individual contract information from the individual information when the comparison result of the comparing means is the same, Updating means for writing and updating to the memory, and channel changing means for changing the channel selected by the tuning means after the updating means has updated,
The tuning means, the demodulation means, the individual information extraction means,
A first power supply for supplying power to the comparison means and the memory writing means, and a second power supply for supplying power to other devices not supplied by the first power supply, and all channels to be updated After updating, the pay-broadcast receiver is characterized in that the second power supply does not supply power.

Further, after the channel storage means for storing the channel (or the number of channels) which needs to be updated, the registration means for registering in the channel storage means, and the memory writing means are updated, The pay broadcast receiver is provided with a means for determining whether or not it is necessary to perform the operation by a channel storage means.

[0010]

In the above-mentioned structure, the individual information receiving means receives the individual information from the related information from the pay broadcasting station when the viewer does not use the pay broadcasting receiver, and the individual information receiving means of the decoder itself When a packet of individual information is received, the pay broadcasting station is updated, and then pay broadcasting stations whose updating work has not been completed are selected one after another and the individual information is updated. The power is turned off when all the individual information of the pay broadcasting stations that need to be updated is received, so it is possible to reduce power consumption, and it is possible to efficiently obtain the individual information of the multiple pay broadcasting stations that need to be updated. You can receive it well.

[0011]

Embodiments of the present invention will be described in detail below with reference to FIGS. First embodiment

FIG. 1 shows a first pay broadcast receiver according to the present invention.
It is a block diagram showing an example of. Power source 2 in FIG.
1 is a video output device 13, an audio output device 14, and a display unit 23.
The power is being supplied to the device when it is viewed and turned on, and the power is supplied when it is not viewed, and the power is not supplied when it is not viewed. The power supply 22 supplies power to blocks other than the block supplied by the power supply 21, and is always kept in the ON state regardless of whether the user is watching or not.

The tuner 11 is supplied with a signal that has received a radio wave, and is supplied to the demodulator 12 with a signal selected by the control signal from the control unit 20. After the signal supplied to the demodulation device 12 is demodulated, the video signal is the video output device 1
The audio data output via
Is output to. The voice data supplied to the data decoder 15 is separated into a voice signal and related information. The voice signal is output via the voice output 14 and the related information is output to the individual packet extraction device 16. Relevant information is supplied to the individual packet extraction device 16, and an individual packet presence / absence signal 1 indicating the presence or absence of a packet of the individual information in the relevant information
7 is output to the control unit 20, and this individual information
Output to the comparison device 18. The ID comparison device 18 uses the ID number of the supplied individual information and the I number from the nonvolatile memory 19.
The D number is compared, and if they match, this individual information is output to the control unit 20. The pay broadcasting station and the number of stations which are updated at that time are inputted to the input section 24 in advance and outputted to the control section 20. Contract information is supplied from the control unit 20 to the non-volatile memory 19, and the contract information is stored.

The control unit 20 is provided with an individual packet presence / absence signal 1
7, the signal from the ID comparison device and the signal from the input unit 24 are supplied, and the signals are output to the nonvolatile memory 19, the power supply 21, the display unit 23, and the tuner 11. Next, the operation of the pay broadcast receiver thus configured will be described.

At the time of viewing, if the packet of the individual information is transmitted from the pay broadcasting station that is being viewed, it is checked whether it is the individual information of the decoder itself and the updating process is performed. Individual information cannot be received while watching a free broadcast station.

In the so-called standby state during non-viewing, such as at night or during absence, the control unit 20 turns off the power source 21, and the tuner for the broadcasting station in which the supplied individual packet presence / absence signal 17 indicates "present". 11 is selected. I
The D number comparison device 18 compares the ID number of the supplied individual information with the ID number written in the non-volatile memory 19, and when they match, outputs a packet of the individual information to the control unit 20. The control unit 20 is supplied with the packet of the individual information having the matching ID number, and after the process of decrypting the encrypted signal is performed, necessary contract information is written in the nonvolatile memory 19. Currently, due to the Radio Law, only information related to that channel can be transmitted on that channel, so for information on other pay broadcasting stations, reselect each broadcasting station and update the same again. I have to process it. As we continue this update,
If the broadcasting station to be updated at that time and the number of broadcasting stations to be updated at that time are inputted from the input unit 24 in advance, it is possible to know whether or not all the pay broadcasting stations that need to be updated have been updated. Even if these inputs are not made in advance, the ID number at the start of receiving the individual information is stored in the memory, and the ID number stored in the memory is constantly checked so that the sending cycle time can be known and the ID number It will not be in a waiting state at a pay broadcasting station that should not be.

By doing so, since the individual information of all pay broadcasts can be efficiently received and the update process can be performed when the viewer is not using the pay broadcast receiver, the update process can be performed in a short time. The power consumption can be reduced. Second embodiment

FIG. 2 shows a second embodiment of the pay broadcast receiver of the present invention.
It is a block diagram showing an example of. The same parts as those in FIG. In FIG.
The power supply 25 is controlled by a signal from the control unit 20, and is turned on to supply power during viewing and updating, and is turned off during non-viewing and ending updating, and does not supply power. The power supply 26 supplies power to the control unit 20 and always keeps the ON state regardless of viewing / not viewing or updating.

Next, the operation of the pay-broadcast receiver thus configured will be described only for the points different from those in FIG. In this embodiment, by providing the power supply 26 for supplying power only to the control unit 20, the energized portion is further reduced.

After the update of one pay broadcasting station is completed, in order to further update the other pay broadcasting stations, it is necessary to re-select each broadcasting station and perform the same updating process again. When continuing this update, if the broadcasting station to be updated at that time and the number of broadcasting stations to be updated at that time are input in advance from the input unit 24, whether all the pay broadcasting stations that need to be updated have been updated. You can know whether or not. Even if these items are not entered in advance, the ID at the start of receiving the individual information
By storing the number in memory and constantly checking the stored ID number, the sending cycle time can be known.
It will no longer be in a waiting state at a pay broadcasting station where the D number should not come. Then, the power supply 25 is turned off when the individual information of all the broadcasting stations is updated.

By doing so, the individual information of all pay broadcasts can be efficiently received and the update process can be performed when the viewer is not using the pay broadcast receiver, so that the update process can be performed in a short time. The power consumption can be reduced.

Further, since the above-mentioned individual packet check processing is not required during non-viewing at a time when there is no plan to update, by inputting the number of updates of zero from the input unit 24, only the power source 26 is turned on during non-viewing. Turns on and does not perform update processing.

Further, since the current date and the like are sent as data in the core tech system, the update process may not be automatically performed after all the pay broadcasting stations required for that month have been updated.

Further, as an operational modification, it is possible to send a packet of individual information of another pay broadcasting station to a broadcasting field which is in a communication field other than broadcasting or whose radio law has been revised. For example, all updates can be done without changing the selection after the second station. In addition, if the same broadcast station may send packets of individual information of multiple broadcast stations (revision of the Radio Law or communication), it should be sent during a certain time T as an operational convention. If the above is specified, all the updates will be completed without worrying about the number of updates, if the packet is fetched only during this T from the first packet reception. This T
Is a cycle time and can be made sufficiently short as compared with a certain number to several tens of hours, so that the probability of starting the search by chance from the middle can be made sufficiently small. Also, by having a plurality of tuners and performing the updating process while switching, the updating work can be completed in a shorter time.

It is also possible to predict the time at which the individual information is transmitted from the received individual information ID number and the like, and the power is automatically turned on at that time to perform the update work.

[0026]

According to the present invention, since the individual information of all pay broadcasts is efficiently received when the viewer is not using the pay broadcast receiver, the update work can be performed in a short time. Power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a pay broadcast receiver according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a pay broadcast receiver according to a second embodiment of the present invention.

FIG. 3 is a diagram for explaining individual information in related information transmitted in a multiplexed manner with a pay broadcast program signal.

[Explanation of symbols]

11 ... Tuner, 12 ... Demodulator, 13 ... Video output device, 14 ... Audio output device, 15 ... Data decode, 16
... Individual packet extraction device, 18 ... ID comparison device, 19 ...
Nonvolatile memory, 20 ... Control unit, 21, 22 ... Power supply, 2
3 ... Display unit, 24 ... Input unit

Claims (2)

[Claims] 1. An input terminal for inputting individual information including an individual ID number and contract information, which is multiplexed with a video (or audio) signal, and a channel selecting means for selecting a signal from the input terminal, Demodulation means for demodulating the video (or the audio) signal from the output of the channel selection means, an output device for outputting the demodulated signal, and individual information extraction means for extracting the individual information from the output of the channel selection means An ID extracting means for extracting an ID number from the extracted individual information; a memory storing contract contents with a broadcasting station; an ID memory storing an ID number; the ID memory and the ID; Comparing means for comparing the outputs of the extracting means, updating means for writing and updating individual contract information in the memory from the individual information when the comparison results of the comparing means match, and the updating means After a channel change means for changing the channel selected station tuning means, said tuning means, said demodulating means, said individual information extracting means,
A first power supply for supplying power to the comparison means and the memory writing means, and a second power supply for supplying power to other devices not supplied by the first power supply, and all channels to be updated The pay broadcast receiver, wherein the second power supply does not supply power after updating. 2. A channel storage unit for storing a channel (or the number of channels) that needs to be updated, a registration unit for registering in the channel storage unit, and an update after the memory writing unit has made an update. The pay broadcast receiver according to claim 1, further comprising: a means for determining whether or not it is necessary to perform the operation by a channel storage means.