JP3469774B2 - Receiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver capable of setting a timer circuit based on time information superimposed on a broadcast signal. 2. Description of the Related Art A TV (television) receiver and a VCR (video cassette recorder) used in ordinary households have a timer function, and when a time reserved by such a function is reached, a timer is set at the time of reservation. It is possible to automatically receive and record the recorded program.
In order to realize the timer function, a timer circuit in a TV receiver or a VCR must perform a timer count operation. [0003] In recent years, global environmental problems have been highlighted, and energy saving has been promoted on a worldwide scale. For home electric appliances, there is a demand for the development of devices that can efficiently use electric energy. In such a situation, as described above, the TV
Those that have a timer function, such as receivers and VCRs,
Even when the original timer operation such as program reservation reception or program reservation recording is not performed, power is always supplied to the timer circuit. The bottleneck is the fact. Accordingly, the present invention is to solve such a problem. The present invention according to claim 1 comprises time information extracting means for extracting time information multiplexed on a television signal, and timer reservation means having a timer circuit, This is a receiving apparatus in which a timer reservation unit is set based on time information from the time axis information extraction unit. A timer information extracting means for extracting time information multiplexed into a television signal according to a second aspect of the present invention, and a timer reservation means having a timer circuit, wherein when the power is turned off when the timer reservation is not set, Operation power is not supplied to the timer reservation means, and when the power is turned off when the timer reservation is set, the operation power is supplied to the timer reservation means, and the power is turned off when the timer reservation is not set. The receiving device is configured to set the time of the timer reservation unit based on the time information from the time axis information extraction unit when the power is turned on. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a broadcasting station system implemented in the present invention. The transmission system comprises a broadcast source 21 and
The transmission operation device 22 includes a transmission control device 23, a television signal transmitter 24, a multiplexer 25, and a transmission antenna 26. That is, the multiplexing device 25 multiplexes the program information and the accurate broadcast time with the video signal from the broadcast source 21. These program information and broadcast time are created by the transmission operation device 22 based on information obtained from the broadcast source, and multiplexed by the multiplexing device 25. A broadcast signal in which program information and broadcast time information are multiplexed is transmitted from a transmission antenna 26 by a television signal transmitter 24. The transmission control device 23 controls the transmission operation device 22. In this way, the current accurate time is given to the analog TV broadcast signal currently being performed. FIG. 2 shows a waveform diagram of a video signal to be broadcast, wherein the time information is 20 horizontal lines or 283 horizontal lines.
It is possible to superimpose on the line as a part of 20-bit data. FIG. 3 shows a waveform diagram of a horizontal line on which 20-bit data is superimposed. FIG. 4 is a diagram showing how the superimposed 20-bit signal is defined. The 20-bit data includes word 0 (2 bits), word 1 (4 bits), and word 2 (8 bits). ) And CRCC. CRCC is Cyclic Red
undancy Check Code. Two bits of word 0 are assigned identification signals of video signals having different aspect ratios. By properly defining word 1, the eight bits of word 2 can indicate the information defined by word 1. In this embodiment, word 1 is (1, 0,
In the case of (0,0), word 2 defines the upper 8 bits of date information, and when word 1 is (1,1,0,0), word 2 defines the lower 8 bits of date information. I made it. When word 1 is (1,0,1,0), the upper 8 bits of the time information are set. When word 1 is (1,0,1,0), 8 bits of the date information are set as word 1 Is (1,0,0,
In the case of 1), the lower 8 bits of the date information are specified. The same information is superimposed on the 20th line and the 283th line, but three frames are enough to send out all of this information.
It can be transmitted ten times per second, and time information can be transmitted in seconds. The television signal transmitted as described above is received by a television receiver having a configuration as shown in FIG. In FIG. 5, a television broadcast signal is received by an antenna 1 and received and selected by a tuner 2. A signal selected and received by the tuner 2 is processed by an intermediate frequency circuit / video circuit / audio signal processing circuit 3, a video signal is supplied to a display unit 5 such as a cathode ray tube via a video output circuit 4, and an audio signal is an audio signal. The signal is supplied to the speaker 7 via the output circuit 6. The video signal from the signal processing circuit 3 is supplied to a data extraction circuit 8. The data extraction circuit 8 extracts the time information superimposed on the horizontal 20 lines or the horizontal 283 lines of the video signal, and supplies it to the control circuit (CPU) 10. 9 is an on-screen display (OS
D) A circuit for displaying time information and channel characters on the screen of the display unit 5. Reference numeral 11 denotes an operation unit of a TV receiver main body or a remote controller, and this operation input is input to the CPU 10. Reference numeral 12 denotes a timer circuit unit, and the circuit unit 12 may be configured as a microcomputer together with the CPU. 13
Is a power supply circuit, and 14 is a first switch. When the switch 14 is on, operating power is supplied from the power supply circuit 13 to the timer circuit unit 12. Reference numeral 15 denotes a second switch. When the switch 15 is turned on, an operating power supply voltage is supplied to each TV circuit other than the CPU 10 and the timer circuit 12. Reference numeral 16 denotes a power plug, which is normally connected to an outlet and has a commercial power supply voltage of the power supply circuit 1.
3 is supplied. Although a case is shown in which the CPU 10 is always supplied with power directly from the power supply circuit 13,
It is also possible to supply power to the PU 10 via the switch 14. Next, the operation of the TV receiver shown in FIG. 5 will be described with reference to the flowchart shown in FIG. Assuming that the TV receiver is in the receiving state, the switches 14 and 15 are in the ON state (S1). In this state, when the operation unit 11 is operated and the power switch is turned off (S2), it is determined whether a timer reservation is set (S3). If it is determined in step 3 that the timer is reserved, the switch 14 remains on but the switch 15 is turned off (S4). Since the switch 14 remains on, the timer circuit 12 is active. Therefore, when it is determined that the timer reception reservation time has come (S
5) The switch 15 is turned on. As a result, a predetermined channel is received according to the information set for timer reservation. Conversely, when the operation unit 11 is operated to turn off the switch 15 of the TV receiver, the switch 14
And the switch 15 are both turned off (S8). As a result, since the timer circuit section 12 does not perform the timer counting operation, the power consumption accompanying the counting operation can be reduced. If power is not supplied to the timer circuit section 12 in this manner, the timer count operation is stopped, but the operation section 1 is again operated.
When the power switch is operated to be turned on by 1 (S9), both the switch 14 and the switch 15 are turned on (S10), and the CPU 10 outputs the time information shown in FIGS. 2 and 3 from the received signal. Remove and set the timer to the current time. Therefore, the time of the internal clock in the TV receiver is always set to a normal time. In the above embodiment, time information is added to a terrestrial broadcast signal. However, in a CS digital broadcast in which broadcasting has started, an EPG (Electric Prog.
Since the current time information is also transmitted as the information of (ramGuide), the timer circuit can be set by using this. In the above embodiment, the TV receiver is used for reservation reception, but can be used for timer setting for VTR reservation recording. As described above, according to the present invention, when the timer reservation is not executed, the supply of power to each circuit unit to the TV is cut off and the power supply to the timer circuit is cut off at the same time. Therefore, power consumption in the timer circuit can be reduced, which greatly contributes to power saving.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a transmitting side according to an embodiment of the present invention. FIG. 2 is a video signal waveform diagram. FIG. 3 is a diagram illustrating a state of data superimposed on a video signal. FIG. 4 is a diagram illustrating details of data superimposed on a video signal. FIG. 5 is a block diagram of a television receiver embodying the present invention. FIG. 6 is a diagram showing an operation flowchart of the present invention. [Description of Signs] 3 IF / video / audio circuit 8 data extraction circuit 10 CPU 11 operation unit 12 timer circuit unit 13 power supply circuit 14 first switch 15 second switch

Continuation of the front page (56) References JP-A-8-102922 (JP, A) JP-A-9-83888 (JP, A) JP-A-7-67047 (JP, A) JP-A-6-236593 (JP) JP-A-9-233715 (JP, A) JP-A-5-63168 (JP, U) Utility model registration 3042285 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/44

Claims (1)

(57) [Claims 1] A time information extracting means for extracting time information multiplexed on a television signal, and a timer reservation means having a timer circuit, wherein no timer reservation is set. When the power is off, the operation power is not supplied to the timer circuit.When the power is turned off when the timer reservation is set, the operation power is supplied to the timer circuit, and when the timer reservation is not set. When the power is turned on from when the power is turned off, the receiving device sets the time of the timer reservation means based on the time information from the time information extracting means.