JPH08149429A - Television receiver - Google Patents

Abstract

PURPOSE: To provide a TV receiver which can automatically select the corresponding broadcasting station and also can set the time by identifying the name of the broadcasting station where the time information is superposed on the TV signal and broadcasted. CONSTITUTION: The radio waves received by an antenna 1 are selected at a tuner part 2 and amplified and detected at a video intermediate frequency amplifying/detecting part 3. Thus the radio waves are turned into the video signals and then into the data after the EDS signal is extracted at an EDS signal extracting part 4. Then an identifying part 5 identifies the name of the broadcasting station where the Greenwich time included the data is broadcasted and also the series name of the broadcasting station. These identified contents are stored in a memory 6 and then given to the part 2. Thus the broadcasting station that broadcasts the Greenwich time can be automatically selected.

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 signal, and more particularly to a television receiver for receiving a time signal included in the television signal and automatically setting a built-in timer.

[0002]

2. Description of the Related Art Conventionally, service information including time information is multiplexed in a vertical blanking period of a television signal and is broadcast. For example, the local time of the area is transmitted as the time information. Also, when recording a program on a video tape, the broadcasting station encodes and transmits the original scheduled start date and time of the program during the broadcasting of each program, receives the transmitted code, and sets it in the VTR. There is provided a television receiver that enables automatic recording without modification even when the broadcast time is changed.

[0003]

[Problems to be Solved by the Invention] Since April 1994, in the United States, a new service, EDS (Exte
nded Data Service) has started. This EDS data signal (hereinafter referred to as EDS signal) includes time information and broadcasting station name information.

Television signals to be broadcast include those that include an EDS signal and those that do not include an EDS signal. Even with a television signal including an EDS signal, the series of broadcasting stations that broadcast the television signal are different. In this case, the contents of the time information are different. The time information of the EDS signal broadcast by a PBS (Public Broadcasting Service) -series broadcast station consists of "Greenwich time" and "Local time difference", which is the difference between the Greenwich time and the local time, and is broadcast by other broadcast stations. The time information of the signal is unknown.

The television receiver can set the time by receiving the time information.
There was a problem that the television signals transmitted by the S-series broadcasting stations had to be selected. The present invention has been made to solve such problems, and ED
A television receiver that enables time setting by receiving the S signal and identifying the name of the broadcasting station that broadcasts the Greenwich time and whether the received EDS signal includes the time difference between the Greenwich time and the local time. The purpose is to provide.

[0006]

A television receiver according to the present invention is a television receiver for receiving information contained in a vertical blanking period of a television signal, and broadcasts a Greenwich time contained in the information. The first identifying means and the second identifying means. The first identifying means and the second identifying means identify the broadcasting station name and the second identifying means for identifying whether the time difference between the Greenwich time and the local time is included in the information. It is characterized in that the time is set based on the contents identified in (4).

[0007]

The first aspect of the television receiver according to the present invention.
The identifying means identifies the name of the broadcasting station that broadcasts the Greenwich time based on the information included in the vertical blanking period, and the second identifying means determines whether or not the time difference between the Greenwich time and the local time is included in the information. Since the broadcasting station that identifies and broadcasts the Greenwich time is automatically selected based on the contents identified by the first identifying means and the second identifying means, the time can be automatically set.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. FIG. 1 is a block diagram of essential parts of a television receiver according to the present invention. In the figure, reference numeral 1 denotes an antenna, and the desired wave of the television broadcast radio wave received by the antenna 1 is tuned by the tuner section 2 and amplified and detected by the video intermediate frequency amplification / detection section 3 to become a video signal. , The EDS signal extraction unit 4 extracts the EDS signal superimposed on the 21st horizontal scanning line of the second field from the video signal and slices it into data, and the identification unit 5 extracts the broadcast station name and the broadcast station name included in the data. The series name of the broadcasting station is identified as information, and necessary information is stored in the memory 6.

At the time of setting the time, the contents stored in the memory 6 are given to the tuner unit 2, the broadcasting station according to the contents is automatically selected, and the time is set by a circuit (not shown). The format of the EDS signal will be described by taking the case of Greenwich as an example. The above sequence is represented in hexadecimal,
It consists of 5 blocks of,
Thursday, 13:18:20 pm. "Actual May 13, 1994 is Friday, and this format is incorrect.

The block "07" is a class code indicating that this sequence is a Miscellaneous Class in the EDS standard, and the block "01" is a type code indicating that this sequence is the time at Greenwich time. Is. (In the case of local time difference, the type code is "04".) Block 54 is data indicating "minute". Since "5" of "54" is expressed as "101" in binary number, "54" becomes "1014" H and the highest "1" is this data is EDS.
It is a signal, and since the lower two digits "14" H is a decimal number "20", "54" indicates "20 minutes". Similarly, “72” in the block is data indicating “hour”. Since "7" of "72" is expressed as "111" in binary number, "72" becomes "1112" H, and the highest "1" has this data in EDS.
It is a signal, and since the lower two digits "12" H is "18" in decimal, "72" indicates "18 o'clock".

"4D" of the block is data indicating "day", and "D" of the lower one digit is "13" in decimal number.
"4D" indicates "13th". Similarly, "45" in the block is data indicating "month", and "45" indicating "May" because the lower first digit "5" is a decimal number "5". "45" in the block is data indicating "day of the week", and "5" in the lower one digit is the fifth "Thursday" counted from Sunday.
Indicates. Similarly, "44" in the block is data indicating "year", and "44" indicates 1994 because "4" in the last digit is 1994 when "4" is added to "1990". “1” of “0100” indicated by “4” H in the first digit of the block and the block is a number indicating that it is an EDS signal. "0F" of the block is an end code indicating the end of data, and "08" of the block is a checksum code indicating a check bit. The lower two digits of the result of adding the two digits of each block are " It is set to be "00" or "80".

The following table shows the information of the broadcasting station, the sequence and the local time difference indicated by the EDS signal, one example each.

By receiving the EDS signal in this way, at the time of Greenwich, the name of the broadcasting station that broadcasts the Greenwich time,
If the broadcast station belongs to the name of the sequence, and if it is a PBS sequence, the local time difference from the Greenwich time in the area receiving the broadcast can be known.

FIG. 2 identifies the broadcast station name based on the EDS signal obtained by the identification unit 5 selecting a channel, identifies whether the broadcast station is a PBS series, and stores the identified result in the memory 6. It is a flow chart which shows the procedure to do. First, the memory 6 is cleared (S1), the channel is selected (S2), and it is determined whether or not the channel is finished.
(S3), in case of YES it is ended, in case of NO it is judged whether there is a station (S4) and in case of YES it is judged whether there is an EDS signal.
(S5) If YES, it is determined whether the PBS 6 broadcasting station name is stored in the memory 6 (S6). If NO, step
It is determined whether or not the broadcasting station that was stationed in S4 is broadcasting the Greenwich time (S7), and if YES, the broadcasting station name is identified (S8). Next, it is identified whether the identified broadcasting station is a PBS series (S9), and if YES, the identified broadcasting station name is stored in the memory 6 as a PBS series (S10), and the process proceeds to step S2 and NO. In the case of, it is judged whether or not the broadcasting station name which is not the PBS series is stored in the memory 6 (S11). In the case of YES, the processing proceeds to step S2, and in the case of NO, the identified broadcasting station name in the memory 6 It is stored as a non-PBS sequence (S12), and the process proceeds to step S2.

If NO in step S4, step S5
If NO in step S7 and NO in step S7, the process proceeds to step S2. If YES in step S3,
Finish the procedure. In this way, when a broadcasting station of the PBS series is selected, the broadcasting station name is stored in the memory 6 as the PBS series and is not stored in the memory 6 thereafter. When a non-PBS affiliated station is selected, the station name is temporarily stored in the memory 6 as a non-PBS affiliated station, and the station continues to be selected.
When a broadcasting station of a series is selected, the broadcasting station name is stored in the memory 6 as a PBS series, and when a broadcasting station of a non-PBS series is selected, the broadcasting station name is not stored. If there is no EDS signal, nothing is stored in the memory 6.

When the broadcasting station name is not stored in the memory 6, the built-in clock is not set. PBS in memory 6
When the affiliated station name is stored, the built-in timer is automatically set based on the Greenwich time and local time difference data contained in the EDS signal obtained by receiving the radio wave broadcast by that station. If a non-PBS series broadcasting station name is stored in the memory 6, it is built-in based on the data of the local time difference which is included in the EDS signal obtained by receiving the radio wave broadcast by that broadcasting station and the local time difference input by the viewer. The running timer is set semi-automatically.

[0017]

According to the present invention, since the broadcasting station that broadcasts the Greenwich time is identified and whether or not the information includes the time difference between the Greenwich time and the local time, the identified content is stored. The built-in timer can be set automatically or semi-automatically based on the stored contents, and the viewer's time and effort to set the timer can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of a television receiver according to the present invention.

FIG. 2 is a flowchart showing an operation procedure of an identification unit shown in FIG.

[Explanation of symbols]

 1 Antenna 2 Tuner Section 3 Video Intermediate Frequency Amplification / Detection Section 4 EDS Signal Extraction Section 5 Identification Section 6 Memory

Claims (1)

[Claims] 1. A television receiver for receiving information included in a vertical blanking period of a television signal, the first identifying means identifying a broadcasting station name for broadcasting the Greenwich time included in the information, and Greenwich. A second discriminating means for discriminating whether the time difference between the local time and the local time is included in the information is provided, and the time is set based on the contents discriminated by the first discriminating means and the second discriminating means. A television receiver characterized in that