JP2005127921A - Automatic time setting device, television receiver, and program for causing computer to execute control processing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic time setting device for speeding up time setting even if the number of channels of broadcast stations transmitting EDS signals is increased, and to provide a television receiver, and a program for causing a computer to execute control processing. <P>SOLUTION: This automatic time setting device is equipped with a data slicer processing part 100 for taking out an EDS signal from an image signal to execute clock data capture processing for extracting time data included in the EDS signal, and a control part 200 for outputting a control signal to the processing part 100 to control the processing part 100 and receiving EDS data including start code information and time information. This device determines whether or not time data exist in the EDS signal within a prescribed time period from the start of the capture processing, and performs control for terminating the capture processing when no time data exist. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an automatic time setting device, a television receiver, and a control process for automatically setting the time of a built-in clock based on time data included in an EDS (Extended Data Service) signal during a vertical blanking period of a television signal. The present invention relates to a program for causing a computer to execute.

  In April 1994, an extended data service (EDS), a new service for superimposing data signals during the vertical blanking period of television signals, was started in the United States. This EDS signal includes time information and broadcast station name information.

  Broadcast television signals may or may not include an EDS signal. Even if a television signal includes an EDS signal, the time of the broadcast station that broadcasts the television signal is different. The information content is different. The time information of the EDS signal broadcast by a broadcasting station of the PBS (Public Broadcasting Service) series consists of “local time”, which is the difference between Greenwich time and local time, and other broadcasting. The time information of the EDS signal broadcast by the station is unknown.

  This EDS signal includes time data, broadcast station (channel) information, program elapsed time information (TIS: Time in show), program time length information (L: Length), and the like.

  Patent Document 1 discloses a television receiver that hides an image based on a program discrimination signal included in an EDS signal. Patent Document 2 discloses a video based on program elapsed time information included in an EDS signal. An automatic recording control apparatus that performs recording is disclosed.

  Further, Patent Document 3 discloses an automatic time setting device that automatically sets the time of a built-in clock based on time data included in the EDS signal, and Patent Document 4 describes based on time data included in the EDS signal. A television receiver that automatically sets a built-in timer is disclosed.

JP-A-8-116495 Japanese Patent Laid-Open No. 9-73684 JP-A-8-129083 JP-A-8-149429

  However, since the automatic time setting device mounted on such a conventional television receiver or video is configured to uniformly capture the clock data of the EDS signal, the channel of the broadcasting station that transmits the EDS signal is different. If it increases, it may take a long time to set the time. Hereinafter, specific problems will be described.

  In the algorithm of the conventional automatic time setting device, when there is an EDS signal, clock data is present, so at least a specified time (1 minute or more) is required from the start of clock data fetching processing to determination. This is because the second reset is confirmed at least once per minute.

Therefore, the problem becomes remarkable when any one of the following conditions is satisfied, and if the number of channels to be searched increases, it becomes a fatal problem. However, since such a problem is an operation on the back side that is originally invisible to the user, the problem is merely not obvious.
(1) Even if there is EDS data, there is no time data
(2) Even if there is EDS data and time data, there is no Time of Day (Greenwich Mean Time)
(3) Even if there is EDS data and there is time data, there is no Local Time Zone and DST Use (local time and daylight saving time)

  The present invention has been made in view of such problems, and an automatic time setting device capable of speeding up the time setting even when the number of channels of broadcasting stations that transmit EDS signals is increased, It is an object to provide a program for causing a computer to execute a television receiver and control processing.

  The automatic time setting device of the present invention is an automatic time setting device that sets the clock time based on the time data of the additional signal included in the vertical blanking interval of the video signal. A clock data fetching process executing means for executing a clock data fetching process for extracting the time signal included in the additional signal, and within a confirmation time set from the start of the clock data fetching process. Control means for determining whether or not the time data exists, and if the time data does not exist, the control means for ending the clock data fetching process.

As a more preferred specific mode, the additional signal is an EDS signal.
Further, it is preferable that the set confirmation time is shorter than a reset confirmation time of the clock data capturing process executed for each channel.

  The control means discriminates at least one of Time of Day (Greenwich Mean Time) of an EDS signal or Local Time Zone & DST Use (Delay of local time and daylight saving time) as the time data. May be.

  As a more preferred specific aspect, the clock data capturing process executing means searches for a receivable channel and executes the clock data capturing process, and the control means is configured such that the time data does not exist in the searched channel. In this case, the clock data capturing process in the channel is terminated.

  The television receiver of the present invention, in a television receiver that receives an additional signal included in the vertical blanking period of the video signal, extracts the additional signal included in the vertical blanking period from the video signal, Clock data fetch processing execution means for executing clock data fetch processing for extracting the time data included in the clock data, and whether or not time data exists in the additional signal within a confirmation time set from the start of the clock data fetch processing And control means for ending the clock data fetching process when the time data does not exist.

  The television receiver may include a display device and a center device having a broadcast receiving tuner and transmitting video and audio data to the display device.

  Further, the present invention takes out an additional signal included in the vertical blanking period from the video signal, executes a clock data capturing process for extracting time data included in the additional signal, and sets the clock data capturing process from the start. A program for determining whether or not time data exists in the additional signal within the confirmation time and causing the computer to execute a control process for ending the clock data capturing process if the time data does not exist. is there.

  As described above in detail, according to the present invention, it is possible to increase the time setting even when the number of channels of broadcasting stations that transmit EDS signals is increased.

  Hereinafter, preferred embodiments of an automatic time setting device and a television receiver according to the present invention will be described in detail with reference to the accompanying drawings.

  The automatic time setting apparatus according to the present embodiment automatically sets a clock by detecting EDS signals supplied through several channels.

[Background explanation of EDS]
First, the EDS signal will be described.
FIG. 7 is a signal waveform diagram showing the data format of the EDS signal.
The EDS signal superimposes a data signal in the vertical blanking interval of the television signal, and includes time information and broadcast station name information. In addition, television signals to be broadcast may or may not include an EDS signal.

  The EDS signal is transmitted on the 21st horizontal scanning line of the second field (Field) in the vertical blanking interval of the television signal, that is, the field 2 of the line 21. The EDS signal format is the same as that in the case of caption. As shown in FIG. 7, the EDS data is converted into EDS data by a start bit through a 503 kHz line clock for each horizontal synchronization signal (H-Sync). As EDS data, standard ASCII 7 bits + ODD parity character code is transmitted every 2 bytes. In the field 2 of the line 21, the ratio of the EDS data is 30%, the CC3 (caption channel 3) and CC4 (caption channel 4) data is 40%, the T3 (text channel 3) and T4 (text channel 4). ) Data account for 30%.

  8 is a table showing the EDS code classification of the first byte of EDS data as a table. FIGS. 9 and 10 show the classification of each class (CLASS) code in the EDS code classification table of FIG. FIG. The MISCELLANEOUS CLASS used in the present embodiment is indicated by the EDS code classification of the second byte in FIG.

As a usage form using EDS data,
(1) Clock (current time, program start time, program end time, program broadcast time, program elapsed time, program remaining time, program delay time)
(2) Program guide (program title, program type, detailed program information, network name, broadcasting station + CH number)
(3) Public service (emergency weather information)
(4) Other services (speech language type and type, caption information, program aspect ratio)
There is.

  The EDS code classification table of FIG. 8 is referred to when the above usage pattern is used. The definition content of the EDS code is encoded with 1-byte (hexadecimal) data. The function function (FUNCTION), class (CLASS), and content are determined for each control code (CONTROL CODE) 01h to 0Fh. Yes. The present embodiment relates to an improvement in taking in time data included in the EDS, and therefore will be described by focusing on EDS clock data. In the EDS code classification table of FIG. 8, the codes related to the clock data of the EDS code are 07h and 08h shown in the shaded portions of FIG. In the codes 07h and 08h of the EDS code, the function (FUNCTION) is Start / Continue, the class (CLASS) is other definition items, and the content is other information data.

  In the EDS code classification table of FIG. 8, CURRENT CLASS, FUTURE CLASS, and CHANNEL TNFORMATION CLASS are defined in more detail by the classification table of FIG. 9, but the EDS clock data of the automatic time setting device of the present embodiment. Since there is no direct relationship with the processing, the description is omitted.

  The MISCELLANEOUS CLASS used in this embodiment is defined in detail in the EDS code classification table of the second byte in FIG. Note that the PUBLIC SERVICE CLASS is also defined in the EDS code classification table of FIG.

The MISCELLANEOUS CLASS in FIG. 10 will be described.
The MISCELLANEOUS CLASS in FIG. 10 defines the contents of the Miscellaneous of the class codes 07h and 08h in the EDS code classification table in FIG. 8 in more detail.

  In the MISCELLANEOUS CLASS, the type, content, and number of data (bytes) are determined for each of the type (TYPE) codes 01h to 04h and 40h. In the EDS clock data processing according to the present embodiment, particularly relevant portions are type codes 01h and 04h shown in shaded areas. In the type code 01h, the number of data of Time of Day (which defines Greenwich Mean Time) is 6 bytes. In the type code 04h, the number of data of Local Time Zone & DST Use (defining the delay between local time and daylight saving time) is 2 bytes. The start code means the first byte + the second byte.

  FIG. 11 is a diagram for explaining Time of Day (Greenwich Mean Time). This packet defines the current time (year, month, day, day of week, hour, minute) with respect to Greenwich Mean Time.

  The Time of Day service becomes a Start command when the first byte of the EDS code is 07h and the second byte is 01h, and becomes a Continue command when the first byte is 08h and the second byte is 01h. . The above commands have lower priority than captions and text codes, and are interrupted by these commands.

  As shown in FIG. 11, in the Time of Day (Greenwich Mean Time) setting format, characters of seconds, hours, days, months, and years are set by bits b7 to b0. The right column of FIG. 11 shows the contents of the data value set in hexadecimal notation in decimal. For example, the second is set to Greenwich Mean Time by designating each bit of P, 1, m5, m4, m3, m2, m1, and m0 in order from b7 to b0. P in b7 is an odd parity bit, and b6 is fixed at 1. In addition, D in FIG. 11 determines whether or not it is during daylight saving time, L determines 2/28 or 2/29 when UTC is 3/1, Z resets the second, and T uses the delay time of the recording relay of the local station Whether or not medium is set. The reception method of Time of Day (Greenwich Mean Time) will be described later with reference to [Table 1].

FIG. 12 is a diagram for explaining Local Time Zone & DST Use (delay between local time and daylight saving time).
The Local Time Zone & DST Use service becomes a start command when the first byte of the EDS code is 07h and the second byte is 04h, and continues when the first byte is 08h and the second byte is 04h (Continue) Command. The above commands have lower priority than captions and text codes, and are interrupted by these commands.

  As shown in FIG. 12, the Local Time Zone & DST Use (delay between local time and daylight saving time) setting format sets a character of time (Hour) and no data (Null) by bits b7 to b0. The right column of FIG. 12 represents the content of the data value set in hexadecimal notation in decimal. For the hour (Hour), the delay between the local time and the daylight saving time is set by designating each bit of P, 1, D, h4, h3, h2, h1, and h0 in order from b7 to b0. P in b7 is an odd parity bit, and b6 is fixed at 1. D sets whether or not daylight saving time is used. The reception method of Local Time Zone & DST Use (delay between local time and daylight saving time) will be described later according to [Table 2] following the reception method of Time of Day (Greenwich Mean Time).

FIG. 13 is a diagram illustrating automatic setting of the current time.
To set the current time automatically, two data are required: Time of Day (Greenwich Mean Time) (6 bytes) and Local Time Zone & DST Use (Local Time and Daylight Saving Time Delay) (2 bytes). .
As shown in FIG. 13, the current time is obtained by subtracting the local time from the Greenwich Mean Time.

FIG. 14 is a diagram illustrating an example of an EDS signal format.
As shown in FIG. 14, a signal coded in hexadecimal is transmitted as EDS data. The portion surrounded by a frame indicates a program title, network, broadcasting station, Greenwich Mean Time, local time, etc. in EDS data.

  For example, a specific example will be described taking the Greenwich Mean Time indicated by “07 01 54 72 4D 45 45 44 0F 08” in the row number 0004A0 of FIG.

  The above number sequence is expressed in hexadecimal notation and indicates Greenwich Mean Time “Thursday, May 13, 1994, 18:20”. As described in FIG. 11, “07” is a class code indicating that it is an EDS standard class, and “01” is a type code indicating that it is the time of Greenwich Mean Time. In the case of the local time difference, the type code is “04” (see FIG. 12).

  The next “54” is data indicating “minute”. Since “5” of “54” is expressed as “101” in binary, “54” becomes “1014” H “0101 0100” b, and the most significant “1” indicates that this data is an EDS signal. Indication (EDS is indicated by the preceding start code), the lower 6 digits “14” H “01 0100” b is decimal “20”, so “54” is “20 minutes” Show. Similarly, “72” is data indicating “hour”. Since “7” in “72” is expressed as “111” in binary, “72” becomes “1112” H “0111 0010” b, and the most significant “1” indicates that this data is an EDS signal. The lower five digits “12” H “1 0010” b are decimal numbers “18”, so “72” indicates “18:00”. “4D” is data indicating “day”, and “0 1101” b in the lower 5 digits of “0100 1101” b is “13” in decimal, so “4D” is “13 days”. “45” is data indicating “month”, and “5” in the lower one digit is “5” in decimal, so “45” indicates “May”. “45” is data indicating “day of the week”, and “5” in the lower one digit indicates the fifth “Thursday” counted from Sunday. “44” is data indicating “year”, and “4” in the lower one digit is “1994” when “4” is added to “1990”, so “44” indicates 1994. Further, “1” of “0100” indicated by “4” H of the upper 1 digit is a number indicating that it is an EDS signal.

  Further, “0F” is an end code indicating the end of data, “08” is a checksum code indicating a check bit, and the lower two digits of the result of adding the two-digit number of each block are “00” or “80 "

  By receiving the EDS signal in this manner, the Greenwich Mean Time, the name of the broadcasting station that broadcasts the Greenwich Mean Time, the name of the series to which the broadcasting station belongs, and the PBS series, in the area that receives the broadcast You can know the local time difference from Greenwich Mean Time.

Next, the types of EDS data will be described.
There are four types of characters in EDS (Extended Data Service).
1. Control Character ・ Function and Class are determined by the control character (see FIG. 8).
• Always the first character of two character pairs.
• The control character has a value between 01h and 0Fh.

2. Type character • Used after the control character to distinguish packet types (see FIGS. 9 and 10).
• Always the second character of two character pairs.
-Type characters have values between 00h and 7Fh.

3. Checksum character • Used after the control character (0Fh) to identify the end of the packet (see FIGS. 9 and 10).
• Always the second character of two character pairs.
-The checksum character has a value between 00h and 7Fh.

4). Informational characters • Since the length of the character is not fixed, it varies according to the amount of packet communication information.
-Always sent in 2-byte units.
Informational characters have an ASCII code between 20h and 7Fh and a non-ASCII code between 40h and 7Fh. Note that the 00h informational character is an invalid character and is always ignored.

Next, a data transmission format will be described.
1. First, it starts by sending a Control (Start) / Type code pair.
2. An informational / informational code pair continues unless a caption or text code is interrupted.
3. If a caption or text code is interrupted, the previously started code is resumed by sending a Control (Continue) / Type code pair. However, the Type code must match with the code of the same class as the Control (Start) code (see FIG. 8). The caption text code can be identified by the first byte data = 10h to 1Fh.
4). Finally, an End / Checksum code pair is sent and the process ends.

Next, the checksum will be described.
The checksum data is used to confirm whether the transmitted data is correct data. The checksum is calculated by checking that the total result of the Control (Start) code, Type code, all the following Informational characters + End (OFh) code and Checksum character is 7-bit binary value = 0. Otherwise NG. Note that the Control (Continue) / Type code pair is not included in the checksum calculation.

  The outline of the clock data of the EDS signal has been described above. Hereinafter, the clock data capturing process of the EDS signal will be described.

[Clock data import processing]
The data of [Table 1] and [Table 2] are fetched from the EDS signal. [Table 1] and [Table 2] are obtained by entering specific numerical values in FIG. 11 and FIG. As described above, EDS data is transmitted every two bytes. In [Table 1] and [Table 2], since one row represents one byte, data is distributed by two rows.

[1] Reception method of Time of Day (Greenwich Mean Time) [Table 1] By receiving the Start code (07 01), input of Time of Day data is started.
2. Every time Informational data (2 bytes) is received, it is checked whether the received data is 7 bytes or more (NG). In the following description, Informational data is abbreviated as INFO code, and Checksum code is abbreviated as CKSUM code.
3. When the End / Checksum code pair is received, it is checked whether the Informational data is 6 bytes. If OK, checksum calculation processing is performed.
4). After confirming the checksum OK, the current time is calculated based on the Local Time Zone & DST Use data, and after the data is converted to a decimal number, data that cannot be used as time data is checked. If it is OK, the current time data is confirmed.
5). If the caption code interrupts during the reception, it waits until the Continue code (08 01) is received. If Time of Day data is not input when the Continue code is received, NG is set.

[2] Local Time Zone & DST Use (delay between local time and daylight saving time) [Table 2] When the Start code (07 04) is received, input of Local Time Zone & DST Use data is started.
2. Every time Informational data (Hour, Null) is received, it is checked whether or not the received data is 7 bytes or more (NG).
3. When the End / Checksum code pair is received, it is checked whether the Informational data is 2 bytes. If OK, checksum calculation processing is performed.
4). After confirming the checksum OK, the data that is not possible as time data is checked. If OK, the data is converted into a decimal number and determined.
5). If the caption code interrupts during reception, it waits for the Continue code (08 04) to be received. If Time of Day data is not input when the Continue code is received, NG is set.

[3] Correction of time data [Table 3] is a table for correcting time data, and is the same table as FIG.

  To set the current time automatically, two data are required: Time of Day (Greenwich Mean Time) (6 bytes) and Local Time Zone & DST Use (Local Time and Daylight Saving Time Delay) (2 bytes). . The current time is obtained by subtracting the local time from the Greenwich Mean Time as shown in [Table 3]. When the internal data of Greenwich mean time is OK and the time difference data is confirmed, the final time is confirmed. When the Greenwich Mean Date is March 1, the L bit representing February 28 (L bit = 0) or February 29 (L bit = 1) is set if the previous day is due to local time data correction. .

[4] Parity check processing • The INFO code is checked because an odd parity bit (P bit) is included in each byte, and when it is NG, the fetching is stopped and the start code is waited again.
Parity errors are ignored for EDS control codes (start code, end code, CKSUM), and finally OK if the checksum matches.

[5] Checksum calculation processing / CKSUM data is used to check whether the sent data is correct.
-The checksum calculation may be such that the total result of the Control code, Type code, all INFO codes, END code, and CKSUM code is 7-bit binary value = 0. That is, the following conditions are satisfied.

Time of Day:
07h + 01h + INFO (minutes) + INFO (hours) + INFO (days)
+ INFO (month) + INFO (day) + 0Fh + CKSUM
Local Time Zone & DST Use:
07h + 04h + INFO (hour) + INFO (null) + 0Fh + CKSUM
・ Continue code is not included in the checksum calculation.

[6] Caption data processing • When the first byte data of the INFO code is input in 10h to 1Fh, the data and subsequent data are discarded because they are caption data.

[Basic concept of the present invention]
The basic concept of the present invention will be described.
In the conventional algorithm, when there is EDS data, the clock data fetching processes [1] to [5] described above are performed uniformly assuming that clock data exists. The clock data import processing [1] to [5] requires a specified time from start to setting, at least 1 minute (since the second reset is determined at least once per minute), and the channel to be searched If it increases, it becomes a fatal problem. This is noticeable when any one of the following conditions is satisfied.
(1) Even if there is EDS data, there is no time data
(2) When there is EDS data and there is no time of day (Greenwich Mean Time) even with time data
(3) When there is EDS data and there is no local time zone & DST Use (delay between local time and daylight saving time) even if there is time data

Therefore, in the present invention, the time data included in the EDS for a predetermined time is monitored a plurality of times, and when there is no time data, the clock data capturing process is terminated.
First, it is confirmed whether or not time data exists in the EDS signal from the start of the clock data capturing process.

One of the following:
Time of Day (Greenwich Mean Time) (07h, 01h) or
Local Time Zone & DST Use (Delay between local time and daylight saving time) (07h, 04h)
It is stored whether or not the acquisition has succeeded even once (regardless of Greenwich Mean Time Z or the like). If the clock data acquisition process does not succeed within the acquisition confirmation time, it is determined that there is no time data, and the clock data acquisition process for that channel is immediately terminated.

〔Example〕
FIG. 2 is a diagram showing a configuration of a wireless AV system including the automatic time setting device according to the embodiment of the present invention based on the above basic concept. The automatic time setting device according to the present embodiment is an example that receives an EDS signal included in a television signal and automatically sets a built-in timer or the like, and is applied to a display-separated type wireless TV receiver. is there.

  In FIG. 2, a wireless AV system 1 includes a wireless center unit (hereinafter referred to as a wireless center) 2 as a base device and a television (TV) main unit (hereinafter referred to as a TV main body) 3 as a portable terminal. The wireless center 2 (wireless communication device, center device) and the TV body 3 (wireless communication device, display device) are paired to form a wireless transmission network.

  The wireless center 2 includes a BS terminal 11, a U / VHF antenna terminal 12, and a diversity terminal 13, and a video 1 input terminal 14 with an S terminal for connecting devices such as a digital VTR and a DVD player, a decoder input / video 2 An input terminal 15, a monitor / BS output / video 3 input terminal 16, an AC power supply unit 17 and a Car-DC power supply unit 18 are provided.

  The TV main body 3 includes a TV output / video 4 input terminal 21 for connecting devices such as a digital VTR and a DVD (Digital Versatile Disc) player, an AC power supply unit 22 and a Car-DC power supply unit 23.

  The TV main body 3 is a thin display device that is separable from the wireless center 2 and can be carried or carried with a built-in battery. For example, a variety of liquid crystal televisions (hereinafter referred to as liquid crystal televisions), inorganic EL / organic EL displays, plasma displays, and the like The display device is a wide concept including the display device and is not limited by the display mechanism. In this specification, the TV main body 3 mainly has a display function, an acoustic function, and the like, while the wireless center 2 mainly stores a control function for controlling the tuner unit and the TV main body 3. The TV main body 3 according to the present embodiment will be described using a liquid crystal television as an example of a thin display device.

  Data is transmitted and received between the wireless center 2 and the TV main body 3 by an SS (Spread Spectrum) wireless system compliant with the IEEE 802.11 standard. Recently, the 5 GHz band is released as a frequency band, and a mode using the 5 GHz band instead of the 2.4 GHz band may be used. Data transmission from the wireless center 2 to the TV main body 3 uses moving picture expert group (MPEG) 2 video compression format to transmit moving image transmission, DVD-Video, and digital broadcasting over a communication line exceeding 10 Mbps. Further, command transmission between the wireless center 2 and the TV main body 3 is performed by the SS wireless method.

  When applying to an actual application including MPEG video and MPEG audio encoded streams (bit strings) and other encoded streams, the encoded streams are multiplexed and integrated into a single unit including synchronization. At the same time, it is necessary to make the stream a data format conforming to a specific physical format or protocol possessed by the storage medium or network.

  The MPEG2 system includes a program stream (MPEG2-PS, PS: Program Stream) that constitutes one program, and a transport stream (MPEG2-TS, TS: Transport Stream) that can constitute a plurality of programs, as in MPEG1. There is.

  The MPEG stream is a byte stream that is byte-aligned for each unit such as a header although there are many 1-bit flags. As a structure common to the entire MPEG system, the data portion that is not fixed length is preceded by information indicating the length. If unnecessary, that portion is skipped or the head of the next data group is confirmed and trusted. It has a data structure that enables highly-separated separation processing.

  An apparatus for receiving compressed video and audio signals in conformity with the MPEG2 encoding system is designed to receive video and audio sampling frequencies on the encoding side in order to prevent overflow and underflow of video and audio data on the decoding side. And the video, audio sampling frequency or STC (System Time Clock) on the decoding side must be matched.

  Therefore, the decoding apparatus uses PCR (Program Clock Reference) or SCR (System Clock Reference) defined by the MPEG2 system standard (ISO / IEC standard 13818-1). Thus, the video and audio sampling frequencies on the encoding side are matched with the video and audio sampling frequencies on the decoding side.

FIG. 3 is a block diagram showing a configuration of the wireless center 2 of the wireless AV system.
In FIG. 3, a wireless center 2 is connected to a BS terminal 11 and receives and selects a BS broadcast by a channel selection signal, and a U / VHF broadcast by a channel selection signal connected to a U / VHF antenna terminal 12. A U / VHF tuner 32 that receives and tunes, and a data slicer that extracts an EDS signal from a video / audio (AV) signal received and tuned by the BS tuner 31 or the U / VHF tuner 32, and slices and captures the data. The processing unit 100, the video / audio demodulation unit 33 that demodulates the video / audio (AV) signal received and selected by the BS tuner 31 or the U / VHF tuner 32, and the audio and EPG (Electrical) received by the audio switching signal Program guide (electronic program guide) and other audio switching unit 34 for switching information related to a program, and video / audio received by a source selection signal And TV commands to and from the first selector 35 for selecting external input information from the video 1 input terminal 14, decoder input / video 2 input terminal 15, monitor / BS output / video 3 input terminal 16 Then, an SS transmission unit 36 (communication means) that converts the data selected by the first selector 35 into an MPEG2 video compression format and transmits the data to the TV main body 3 by the SS wireless method, a channel selection signal 41, and an audio switching signal. 42, a source selection signal 43, a data slice control signal, and the like, and a wireless center microcomputer (hereinafter referred to as a microcomputer) 37 for transmitting and receiving TV commands 44 to control the entire apparatus, and a control program for the wireless center microcomputer 37 , Communication control data, and communication channel change program Constructed and a EEPROM (electrically erasable programmable ROM) 38 which is electrically rewritable nonvolatile memory for storing data.

  The wireless center 2 may include a plurality of broadcast receiving tuners (two in this case), and at least one of the plurality of BS tuners 31 and the U / VHF tuner may be a tuner capable of receiving terrestrial digital broadcasting.

  The data slicer processing unit 100 starts from the video / audio (AV) signal received and selected by the tuners 31 and 32 according to the data slicer control signal from the microcomputer 37, and is the 21st horizontal in the second field in the vertical blanking interval. A data slice process for extracting the EDS signal superimposed on the scanning line and slicing the data is performed. This data includes EDS data such as the start code and time data described above. A detailed configuration of the data slicer processing unit 100 will be described later with reference to FIG.

  The wireless center microcomputer 37 controls the entire wireless center device and has a function as a data slicer control unit for controlling the data slicer processing unit 100. The wireless center microcomputer 37 controls the data slicer processing unit 100 to obtain a code by extracting EDS data. And auto clock speed-up processing (described later with reference to FIG. 5) is executed. The EEPROM 38 stores information such as broadcast station names and broadcast station series names included in the EDS data.

  The SS transmission unit 36 includes an A / D conversion unit 51 that converts the data selected by the first selector 35 into a digital signal, an MPEG2 encoder 52 that converts the data into an MPEG2 video compression format, and transmission data according to the SS wireless system. An SS radio transmission engine 53 including an SS radio device and a radio control unit for transmission, and each part of the SS transmission unit are controlled, and a first SS-CPU 54 that detects a radio wave state is provided.

  The SS wireless transmission engine 53 has a transmission function for transmitting an MPEG2 stream, a command, and the like to an SS reception unit 61 (described later in FIG. 4) of the TV main body 3 and a reception function for receiving a command and the like from the SS reception unit 61. Prepare.

  Various specifications in the wireless center 2 and the TV main body 3 can be changed by changing a program written in the EEPROM 38. That is, recently, in order to avoid the time loss of changing the mask ROM for each debugging of the system development, the program ROM is a non-volatile memory, for example, EPROM, EEPROM, and the time for program development / modification time is greatly reduced. . Further, if the program is downloaded and the program contents of the EEPROM are rewritten, it is possible to easily upgrade functions or change functions.

FIG. 4 is a block diagram showing a configuration of the TV main body 3 of the wireless AV system.
In FIG. 4, the TV main body 3 receives and transmits the TV command and receives the MPEG2 stream and command transmission data transmitted from the SS transmission unit 36 of the wireless center 2, and decodes (restores) the received MPEG2 stream to the original data. ) SS receiving unit 61 (communication means), a second selector 62 for selecting data restored by the SS receiving unit 61 and an AV signal input from the outside via the TV output / video 4 input terminal 21; The TV display unit 63 including an LCD or the like that displays a video signal and outputs an audio signal transmits / receives a TV command 71, and transmits a source selection signal 72, an OSD (on-screen display) 73, etc. TV microcomputer 64 for controlling, control program for TV microcomputer 64, communication EEPROM 65, which is an electrically rewritable non-volatile memory for storing various data such as control data and a communication channel change program, and a remote controller for receiving control commands from a remote control device (not shown) (hereinafter referred to as a remote control device). A light receiving unit 66, a battery 67, and a battery charger microcomputer 68 that controls charging / discharging of the battery 67 are provided.

  The SS reception unit 61 includes an SS radio reception engine 81 including an SS radio and a radio control unit that receives data transmitted by the SS radio system, an MPEG2 decoder 82 that decodes the received MPEG2 stream, and an analog signal for the decoded data. The D / A conversion unit 83 for converting the signal to the signal and the respective units of the SS receiving unit are controlled, and the second SS-CPU 84 for detecting the radio wave state is provided.

  The SS radio reception engine 81 has a reception function for receiving an MPEG2 stream, a command and the like from the SS transmission unit 36 of the wireless center 2 and a transmission function for transmitting a command and the like from the SS reception unit 61.

  In particular, the second SS-CPU 84 detects a radio wave state detection for detecting a communication state (a radio wave strength, a communication path disturbance) between the wireless center 2 and the TV main body 3 by a retransmission request based on the electric field strength and error rate of the received radio wave. A function as a means is provided. Information indicating the detected radio wave state is sent to the TV microcomputer 64 as a TV command 71. In the present embodiment, the configuration in which the second SS-CPU 84 of the TV main body 3 has the above-described radio wave state detection function is shown. However, the first SS-CPU 54 of the wireless center 2 has the same function and detects the detected radio wave. A mode in which information indicating the state is transmitted from the wireless center 2 to the TV main body 3 may be used. Alternatively, both the first SS-CPU 54 and the second SS-CPU 84 may have a radio wave state detection function. Furthermore, the aspect which the TV microcomputer 64 or the wireless center microcomputer 37 performs the said electromagnetic wave state detection function may be sufficient.

  The TV microcomputer 64 has an OSD generation function unit therein, and displays information such as a channel, time, and volume on a screen of a television or the like. In an electronic apparatus such as a video apparatus such as a TV or a video conference system, information such as a channel, time, and volume is generally displayed on a TV screen. The OSD data is not an image, but is stored in a format called a bitmap. This bitmap is converted into YUV format pixel values represented by Y, Cb, and Cr, and the converted pixels are used for television broadcasting or the like. Is superimposed on the original image. Further, if an image playback device such as a DVD (not shown) is connected to the TV output / video 4 input terminal 21, OSD display is possible by superimposing the playback image on the display screen.

  Although not shown, the TV main unit 3 includes a speaker, a key input unit, a slot for inserting / removing a card type external expansion storage medium, and the like. It is good also as a structure which reads directly. Card-type external expansion storage media include, for example, SRAM (Static RAM) cards that hold information written by power backup, compact flash (CF) including flash memory that does not require power backup, smart media, memory sticks, and more It is an ultra-compact hard disk drive (HDD) or the like that can be mounted on a PC card Type II or the same size as a compact flash.

  The remote control light receiving unit 66 is an optical communication port unit that uses IR (Infrared Rays) and receives optical signals from a remote control device that performs various operations on the TV body 3 or the wireless center 2. Specifically, it is a standard for transmitting data using infrared rays, an I / O port for performing optical communication in accordance with IrDA (Infrared Data Association), ASK, or the like, or a wireless communication port using radio waves. .

  The battery 67 supplies predetermined power to each part of the TV main body 3. When the battery 67 is in a chargeable state, the battery charger microcomputer 68 detects, for example, that the TV main body 3 is attached to the wireless center 2 or other cradle, and supplies a power supply terminal ( In either case, charging / discharging is controlled via a not shown). Specifically, the battery charger microcomputer 68 integrates the discharge current of the battery pack and starts charging when it is determined that the remaining capacity of the battery pack has become a predetermined value or less. The charging is stopped when it is determined that the battery pack has been fully charged. The charged battery 67 becomes the main power source of the portable TV when the TV main body 3 is disconnected from the commercial power source, and supplies power to each part of the main body.

  FIG. 1 is a block diagram of an automatic time setting device applied to the wireless TV receiver, and corresponds to the data slicer processing unit 100 and the data slicer function unit of the wireless center microcomputer 37 shown in FIG. A thick solid line in FIG. 1 indicates a data flow, and a broken line indicates a control signal.

  In FIG. 1, a data slicer processing unit 100 extracts and slices an EDS signal from a video signal, acquires data, and supplies the data to a control unit 200. A start code detection unit 110 that detects start code information from EDS data. And a time acquisition unit 120 for acquiring time information. Details of the start code information and the time information are described with reference to FIGS. 7 to 14 and [Table 1] to [Table 3]. The data slicer processing unit 100 functions as clock data acquisition processing execution means for extracting an EDS signal included in the vertical blanking period from the video signal and executing clock data acquisition processing for extracting time data included in the EDS signal. Have

  The control unit 200 includes a data slicer control unit 210 that outputs a control signal to the data slicer processing unit 100 to control the data slicer processing unit 100 and receives EDS data including start code information and time information. Further, a power failure information operation signal is input to the control unit 200. The control unit 200 determines whether or not time data is present in the EDS signal within a predetermined time from the start of the clock data fetching process, and terminates the clock data fetching process when the time data does not exist. As a function.

  In the present embodiment, the wireless center microcomputer 37 shown in FIG. 3 has a function as the main control unit 200 and executes the auto clock speed-up process shown in FIG. The controller 200 or the data slicer controller 210 is not limited to this configuration, and other input / output control microcomputers and electronic circuits may have this function. Further, the wireless center microcomputer 37 may be configured to have the function of the data slicer processing unit 100.

Hereinafter, an EDS acquisition operation of the wireless TV receiver configured as described above will be described.
5 and 6 are flowcharts showing the auto clock speed-up process of the automatic time setting device, which is executed in the control unit 200 and the data slicer processing unit 100. FIG. In the figure, S indicates each step of the flow.

  When the auto clock acceleration process starts, the control unit 200 resets the time acquisition process loop time, the start code state, and the time data presence / absence at the start of time acquisition in step S1. Next, in step S <b> 2, the data slicer control unit 200 transmits an activation command to the start code detection unit 110 and the time acquisition unit 120 of the data slicer processing unit 100. The control unit 200 executes the following loop processing until the loop time elapses from the loop end of step S3 to the loop end of step S15.

  First, in step S4, it is determined whether or not the loop time has elapsed. If the loop time has elapsed, in step S5, the data slicer control unit 210 determines that there is no time data, stops time acquisition, and ends this flow. To do.

  If the loop time has not elapsed in step S4, the start code detection unit 110 transmits start code information to the data slicer control unit 210 in step S6, and the data slicer control unit 210 transmits the start code information in step S7. Receive.

  Next, in step S8, the data slicer control unit 210 checks whether it is time data based on the start code. If it is not time data in step S9, the process returns to step S4.

  If the time data is the start code in step S9, the data slicer control unit 210 checks in step S10 whether the start code is received for the first time, and determines the number of times the start code is received in step S11. When the start code is received for the first time, the data slicer control unit 210 determines in step S12 that the first time data is present, clears the count without time data, and returns to step S4.

  If the number of times the start code is received at step S11 is the second time, the data slicer control unit 210 at step S13 determines whether the results of the first and second start codes are 1) Greenwich time and 2) Local time, 2) Check whether it falls in local time or 1) Greenwich time.

  Next, it is checked in step S14 which of the above is true, and if neither of the above is true, the process is repeated until the loop time elapses from the loop end of step S15 to the loop end of step S3.

  In step S14, if there is any one of 1) Greenwich time and 2) Local time or 2) Local time and 1) Greenwich time, the data slicer control unit 210 determines that the time data is present in Step S16. Continue to acquire and end this flow.

  Further, as shown by a broken line portion in FIG. 6, the control unit 200 monitors time information from the time acquisition unit 120 even during the loop processing, and may end after acquiring the time.

  As described above, the automatic time setting device according to the present embodiment includes the start code detection unit 110 that detects start code information from EDS data, and the time acquisition unit 120 that acquires time information, and the EDS from the video signal. A data slicer processing unit 100 for executing a clock data capturing process for extracting a signal and extracting time data included in the EDS signal; and outputting a control signal to the data slicer processing unit 100 to control the data slicer processing unit 100; And a control unit 200 having a data slicer control unit 210 for receiving EDS data including start code information and time information. The control unit 200 has time data in the EDS signal within a predetermined time from the start of the clock data capturing process. If the time data does not exist, the clock data is collected. Since there is no valid time data in the EDS signal, the clock data capture process is not executed indefinitely in the corresponding search channel, and the time setting is accelerated. Can be achieved. In particular, even when the number of channels of broadcasting stations that transmit EDS signals increases in the future, it is possible to cope with speeding up of time setting.

  It should be noted that the automatic time setting device of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention. For example, although an automatic time setting device is applied to a portable TV as a wireless AV device, the device is not limited to a general TV receiver or TV receiver using a wired connection antenna, and has an automatic recording function or a combination thereof. It is applicable to. For example, as an AV device, in addition to a VTR (Video Tape Recorder), a recording / reproducing apparatus for recording on an HDD or a DVD may be used. In addition, as a device that can transmit and receive data, a device that is integrated with an information device function represented by a personal computer may be used, and it can be applied to all systems. Further, as long as it is an additional signal included in the vertical blanking interval of the video signal, the data content is not limited to the EDS signal.

  In this embodiment, the TV receiver has been described. However, the present invention is not limited to this, and as described above, the present invention can be applied to a tuner, a personal computer, and other AV devices using the tuner.

  Further, the types of the processing units and the like and the type / format of the setting information constituting the automatic time setting device and the TV receiver are not limited to the above-described embodiments. In particular, it is suitable for application to a device that complies with HAVi.

  In addition, as a tuner, two broadcasts of a BS tuner and a U / V tuner are given as an example, but the type and number of broadcasts such as a CS tuner are not limited to this.

  In this embodiment, the name “automatic time setting device” is used. However, this is for convenience of explanation, and an automatic time setting circuit, an AV device, a broadcasting station channel selection device, or the like may be used.

  The automatic time setting device described above is also realized by a program for causing the automatic time setting device to function. This program is stored in a computer-readable recording medium. In the present invention, as the recording medium, the main memory itself may be a program medium, or a program reading device is provided as an external storage device and can be read by inserting the recording medium therein. May be. In either case, the stored program may be configured to be accessed and executed by the CPU, or in any case, the program is read and the read program is not shown in a program storage area. The program may be downloaded and executed by the program. It is assumed that this download program is stored in the main device in advance.

  Here, the program medium is a recording medium configured to be separable from the main body, such as a tape system such as a magnetic tape or a cassette tape, a magnetic disk such as a floppy (registered trademark) disk or a hard disk, or a CD-ROM / MO /. It may be a medium carrying a fixed program including a disk system of an optical disk such as MD / DVD, a card system such as an IC card / optical card, or a semiconductor memory such as a mask ROM, EPROM, EEPROM, flash ROM or the like. .

  Furthermore, although not shown in the figure, when a means capable of connection to an external communication network is provided, the program is fluidly supported so that the program is downloaded from the communication network via the communication connection means. It may be a medium. When the program is downloaded from the communication network in this way, the download program may be stored in the main device in advance, or may be installed from another recording medium. The content stored in the recording medium is not limited to a program, and may be data.

It is a block diagram of the automatic time setting device applied to the television receiver of the automatic time setting device of the embodiment of the present invention. It is a figure which shows the structure of a wireless AV system provided with the automatic time setting apparatus of embodiment of this invention. It is a block diagram which shows the structure of the wireless center of a wireless AV system provided with the automatic time setting apparatus of this Embodiment. It is a block diagram which shows the structure of TV main body of a wireless AV system provided with the automatic time setting apparatus of this Embodiment. It is a flowchart which shows the auto clock speed-up process of the automatic time setting apparatus of this Embodiment. It is a flowchart which shows the auto clock speed-up process of the automatic time setting apparatus of this Embodiment. It is a signal waveform diagram which shows the data format of the EDS signal of the automatic time setting apparatus of this Embodiment. It is a figure which shows the classification | category of the EDS code | cord | chord of the 1st byte of the EDS data of the automatic time setting apparatus of this Embodiment as a table | surface. FIG. 9 is a table showing the classification of each class (CLASS) code in the EDS code classification table of FIG. 8. FIG. 9 is a table showing the classification of each class (CLASS) code in the EDS code classification table of FIG. 8. It is a figure explaining Time of Day (Greenwich mean time) of the automatic time setting device of this embodiment. It is a figure explaining Local Time Zone & DST Use (delay of local time and daylight saving time) of the automatic time setting device of this embodiment. It is a figure explaining the automatic setting of the present time of the automatic time setting apparatus of this Embodiment. It is a figure which shows an example of the EDS signal format of the automatic time setting apparatus of this Embodiment.

Explanation of symbols

1 Wireless AV System 2 Wireless Center Unit (Wireless Center) (Radio Communication Device, Center Device)
3. Television main unit (TV main unit) (wireless communication device, display device)
11 BS terminal 12 U / VHF antenna terminal 13 Diversity terminal 14 Video 1 input terminal with S terminal 15 Decoder input / Video 2 input terminal 16 Monitor / BS output / Video 3 input terminal 17 AC power supply unit 18 Car-DC power supply unit 21 TV Output / video 4 input terminal 22 AC power supply unit 23 Car-DC power supply unit 31 BS tuner 32 U / VHF tuner 33 Video / audio demodulation unit 34 Audio switching unit 35 First selector 36 SS transmission unit (communication means)
37 Wireless center microcomputer (clock data fetch processing execution means, control means)
38,65 EEPROM
51 A / D converter 52 MPEG2 encoder 53 SS wireless transmission engine 54 SS-CPU
61 SS receiving unit (communication means)
62 second selector 63 TV display unit 64 TV microcomputer 66 remote control light receiving unit 67 battery 68 battery charger microcomputer 81 SS wireless reception engine 82 MPEG2 decoder 83 D / A conversion unit 84 second SS-CPU
100 Data slicer processing unit (clock data fetch processing execution means)
110 start code detection unit 120 time acquisition unit 200 control unit (control means)
210 Data slicer controller

Claims (8)

In an automatic time setting device that sets the time of a clock based on time data of an additional signal included in a vertical blanking interval of a video signal,
A clock data fetching process executing means for taking out an additional signal included in the vertical blanking period from the video signal and executing a clock data fetching process for extracting time data included in the additional signal;
Control means for determining whether or not time data exists in the additional signal within a confirmation time set from the start of the clock data capturing process, and ending the clock data capturing process if the time data does not exist And an automatic time setting device.   2. The automatic time setting apparatus according to claim 1, wherein the additional signal is an EDS signal.   2. The automatic time setting apparatus according to claim 1, wherein the set confirmation time is shorter than a reset confirmation time of the clock data capturing process executed for each channel.   The control means determines at least one of Time of Day (Greenwich Mean Time) of an EDS signal or Local Time Zone & DST Use (lag between local time and daylight saving time) as the time data. The automatic time setting device according to claim 1. The clock data capturing process execution means searches for a receivable channel and executes the clock data capturing process.
2. The automatic time setting apparatus according to claim 1, wherein when the time data does not exist in the searched channel, the control means ends the clock data capturing process in the channel. In a television receiver that receives an additional signal included in a vertical blanking period of a video signal,
A clock data fetching process executing means for taking out an additional signal included in the vertical blanking period from the video signal and executing a clock data fetching process for extracting time data included in the additional signal;
Control means for determining whether or not time data exists in the additional signal within a confirmation time set from the start of the clock data capturing process, and ending the clock data capturing process if the time data does not exist And a television receiver.   7. The television receiver according to claim 6, comprising a display device and a center device having a broadcast receiving tuner and transmitting video and audio data to the display device.   Extracting an additional signal included in the vertical blanking period from the video signal, executing a clock data capturing process for extracting time data included in the additional signal, and within a confirmation time set from the start of the clock data capturing process, A program for determining whether or not time data exists in the additional signal and causing the computer to execute a control process for ending the clock data fetching process when the time data does not exist.

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