JP2001358603A - Digital broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital broadcasting receiver, capable of easily channel- selecting even if channel title information is changed or even if there is a newly started program. SOLUTION: When a broadcasting station, having a transmission frequency of 78.6 MHz changes a Pty code: 1, for the contents of a program: a channel title of sports from a Serie A to a premier league, as shown in Fig. (c), the digital broadcasting receiver updates the channel title corresponding to the receiving frequency of 78.6 MHz of a list from the Serie A to the premier league. When a broadcasting, having the transmission frequency of 88.3 MHz, Pty code: 4, the contents of a program: movies, and the channel title: when a foreign film is newly started as shown in Fig. (d), a receiving frequency: 88.3 MHz, a channel title: foreign film, Pty: 4 are added to the list, and are notified to the user as shown in Fig. (c).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast receiver, and more particularly to a digital broadcast receiver capable of easily selecting a multi-channel digital broadcast.

[0002]

2. Description of the Related Art In a conventional radio receiver, information such as a broadcast station name and the frequency of the broadcast station is stored in a memory in advance.
The user selects a channel based on the stored information. By the way, in recent years, digital broadcasting has made it possible to broadcast a wide variety of programs due to the advancement of digital broadcasting technology. With the advancement of such technology, the conventional broadcasting format itself will change drastically, and accordingly, users can use various titles such as music programs, sports broadcasts, news, etc. using, for example, channel title information indicating the broadcast contents. , A desired program can be selected from the broadcast. In addition, digital broadcasting adopts a high compression transmission standard having many sound qualities and compression levels, and tends to perform multi-channel transmission using an optimal transmission standard according to the sound quality of the broadcast.

[0003]

However, since the channel title information can be changed on the broadcast station side, the channel title information corresponding to the broadcast content changes, making it difficult to find a desired program. Conceivable. Broadcasts of various contents and sound quality are provided one after another, because the program is diversified and the user's choices are expanded,
To check a newly started program or the like from many programs, a complicated operation is required. From the above, the object of the present invention is that even if the channel title information is changed,
Another object of the present invention is to provide a digital broadcast receiver capable of easily selecting a channel even when a newly started program is present.

[0004]

According to the present invention, there is provided a digital broadcast receiver which broadcasts a desired program by using channel title information. A memory capable of storing at least channel title information, a search means for searching a reception frequency band at predetermined time intervals, and a frequency of a receiving station received by the search means and at least channel title information are stored in the memory. Determining means for determining whether or not the receiving frequency and at least the channel title information match; and if the receiving frequency matches and the corresponding channel title information is different by the determining means, the previous channel title information is replaced with the new channel title information. Update to information, there is no matching reception frequency in the memory If it is accomplished by having a control means for storing in said memory a receiving frequency and a channel title information of the receiving station in association.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (A) Schematic Description of the Present Invention FIG. 1 is a schematic explanatory diagram of channel title information update control according to a digital broadcast receiver of the present invention. First, as shown in (a), a broadcasting station transmits a PTy code and a corresponding program content, for example, if PTy is 1, sports, 2
If so, it is news. Further, the broadcast station can freely change the channel titles representing the program contents subdivided from the PTy. For example, in the case of the PTy1 sports, the channel title can be Serie A, Premier League, or the like.
The broadcasting station multiplexes various kinds of information including these pieces of information on digital broadcasting and broadcasts them. The digital broadcast receiver can receive such information contained in the digital broadcast and store it in a list as shown in FIG.

In the present invention, for example, a transmission frequency of 78.6 is used.
When the broadcasting station of MHz changes the channel title of Pty code: 1, program content: sports from Serie A to Premier League, the digital broadcasting receiver supports the reception frequency of 78.6 MHz in the list as shown in (c). The channel title to be updated from Serie A to Premier League. Also, as shown in (d), the transmission frequency is 88.3 MHz,
When the broadcast of Pty code: 4, program content: movie, channel title: foreign film is newly started, reception frequency: 88.3 MHz, channel title: foreign film, PTy: 4 are added to the list as shown in (c). You.

(B) Embodiment of the Present Invention (a) Configuration of Digital Broadcast Receiver of the Present Invention FIG. 2 is a configuration diagram of a digital broadcast receiver of the present invention. In the figure, 11 is an antenna, 12 is a digital broadcast receiving unit for receiving a desired digital broadcast via the antenna 11, restoring and outputting high-efficiency coded data (MPEG data or the like) included in the broadcast, and 13 is a digital broadcast An amplifier that amplifies and outputs an analog audio signal demodulated by a receiver, 14 is a speaker that outputs audio, 15 is a device that controls a receiver and stores information such as a reception frequency and a channel title in a memory described later. Controlling processor (CP
U) and 16 are display units for displaying the frequency and the like of the receiving station, 17
Is an operation unit for performing channel selection and volume adjustment.

[0008] As shown, the digital broadcast receiving unit 12 includes an RF unit 12a, an A / D converter 12b, and a demodulating unit 12b.
c, an error correction section 12d, an MPEG section 12e, a D / A converter 12f, and the like. The RF unit 12a receives a digital broadcast signal and outputs a baseband signal, and the A / D converter 12b converts a baseband analog signal into digital data. The demodulation unit 12c demodulates the digital data and outputs MPEG data or the like. The error correction unit 12d performs an error correction process on the demodulated MPEG data, and the MPEG unit 12e converts the MPEG data or the like input from the error correction unit 12d into the original digital audio data. The D / A converter 12f converts digital audio data into an analog audio signal.

The CPU 15 has a memory 15 as shown in FIG.
a, a search unit 15b, a reception frequency / channel title information determination unit 15c, and the like. The memory 15a stores the reception frequency of the receiving station and the channel title information corresponding to the reception frequency. The search unit 15b searches the reception frequency band every predetermined time. The receiving frequency / channel title information determining unit 15c determines whether the frequency and channel title information of the receiving station received by the searching unit 15b match the receiving frequency and channel title information stored in the memory 15a. And C
The PU 15 updates the received channel title information to new channel title information if the received frequency matches and the corresponding channel title information is different by the received frequency / channel title information determining unit 15c, and the received frequency matches the memory. If no is present, control is performed to store the reception frequency of the receiving station in the memory 15a in association with the channel title information.

(B) Frame structure FIG. 3 shows a mode 2 employed in a digital broadcast receiver.
FIG. 4 is an explanatory diagram of a frame structure of FIG. One frame includes a two-symbol synchronization signal SYNC, a three-symbol high-speed information channel FIC, and a 72-symbol data field DFL. The synchronization signal SYNC includes a null symbol used to recognize the start point of the frame. The phase reference symbol PRS is included.

[0011] The high-speed information channel FIC is composed of three high-speed information blocks FIB. The data field DFL is divided into 72 data fields, and a broadcast signal of a predetermined service or announcement is inserted in each data field, so that a plurality of services can be received simultaneously from one broadcast wave. ing. Which service corresponds to which data field is specified by the array data of the service included in the high-speed information channel FIC, and includes the channel title.

The high-speed information block FIB is composed of a plurality of high-speed information groups FIG. Each high-speed information group FIG includes a FIG header and a FIG data field. The FIG header has a FIG type indicating the type of data included in the FIG data field and a Lengt indicating the byte length of the FIG data field.
h. The first byte of the FIG data field has different contents for each FIG type, and an extension is included in a part thereof.

For example, in the case of a type 0 field,
In the first byte of the FIG data field, a C / N (Current / Next) flag, an O
An E (Other Ensemble) flag, a P / D flag, and an extension are included. The detail of the data included in the FIG data field is defined by the FIG type and the extension. Below,
For example, extension 3 of FIG type 0 field
Is represented as FIG (0/3).

A data field FIG (1/1) corresponding to the extension 1 of the FIG type 1 field.
In 1), an SId indicating a service ID of a program and a character field in which a name of a channel title is entered.
Etc. are included.

An area excluding the first byte of the FIG data field contains various data specified by the FIG type and the extension. By reading this data, various reception controls can be performed. For example, FIG (0/17) includes a program type PTy corresponding to each service.

(C) Flowchart of Channel Title Information Update Control According to Digital Broadcast Receiver of the Present Invention FIG. 4 is a flowchart of channel title information update control according to the digital broadcast receiver of the present invention. First, the search unit 15b of the digital broadcast receiver searches the reception frequency band (step 101), and stores the received frequency and the channel title information corresponding to the frequency in the memory 15a (step 102). Next, the reception frequency band is searched by the search unit 15b for a predetermined time, for example, every 24 hours (step 103), and the reception frequency / channel title information determination unit 15c determines whether the received frequency is stored in the memory 15a. (Step 1
04). Thereafter, if the reception frequency does not exist in the memory 15a, the reception frequency and the channel title information corresponding to the reception frequency are stored in the memory 15a (step 105). On the other hand, if the reception frequency exists, it is checked against the channel title information corresponding to the reception frequency (step 106). Next, it is determined whether or not the channel title information matches (step 107), and if they match, the process ends. On the other hand, when the channel title information does not match, the channel title information corresponding to the reception frequency stored in the memory 15a is updated under the control of the CPU 15 (step 108). Next, the channel title information is stored in the memory 15.
stored in a (step 109). In the embodiment of the present invention, the reception frequency and the channel title information are used, but a combination of a code for identifying a channel and a channel title may be used.

[0017]

As described above, according to the present invention, a receiving frequency of a receiving station, a memory capable of storing at least channel title information corresponding to the receiving frequency, and a search means for searching a receiving frequency band at predetermined time intervals are provided. Determining means for determining whether the frequency of the receiving station received by the search means and at least the channel title information match the received frequency stored in the memory and at least the channel title information; and Are matched and the corresponding channel title information is different, the previous channel title information is updated with new channel title information. If there is no matching reception frequency in the memory, the reception frequency of the reception station and the channel Control means for storing the title information in the memory in association with the title information. Since, the broadcast of the updated channel title information and new can be easily tuning. And the contents can be easily notified.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram of the present invention.

FIG. 2 is a configuration diagram of a digital broadcast receiver of the present invention.

FIG. 3 is an explanatory diagram of a frame structure.

FIG. 4 is a flowchart of a channel title information updating method according to the present invention.

[Explanation of symbols]

 PTy-Program type

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Claims (1)

[Claims] 1. A digital broadcast receiver that broadcasts a desired program using channel title information, comprising: a receiving frequency of a receiving station; a memory capable of storing at least channel title information corresponding to the receiving frequency; Search means for searching a reception frequency band for each time; frequency of a reception station received by the search means; and whether at least channel title information matches the reception frequency stored in the memory and at least channel title information A receiving means that determines whether the received frequency is the same and the corresponding channel title information is different, the previous channel title information is updated with new channel title information, and the receiving frequency that matches the memory is updated. If there is no reception, the reception frequency of the receiving station and the channel Digital broadcast receiver characterized by comprising a control means for storing in said memory in association with the panel title information.