JP3738818B2 - Digital broadcast receiver - Google Patents

Description

[0001]
BACKGROUND 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]
[Prior art]
In a conventional radio receiver, information such as a broadcast station name and a frequency of the broadcast station is stored in advance in a memory, and a user selects a channel based on the stored information.
By the way, in recent years, broadcasting of various programs has become possible by digital broadcasting due to advances in broadcasting digitalization technology. With the advancement of such technology, the conventional broadcasting form itself will change greatly, and as a result, users can use various channel genres such as music programs, sports broadcasts, news etc. It becomes possible to select a desired program from the broadcasts. Digital broadcasting adopts a high compression transmission standard having many sound quality and compression levels, and tends to perform multi-channel transmission using an optimum transmission standard depending on the sound quality content of the broadcast.
[0003]
[Problems to be solved by the invention]
However, since the channel title information can be changed on the broadcasting station side, the channel title information corresponding to the broadcast content changes, and it may be difficult to find a desired program. Also, the continuous provision of various contents and sound quality broadcasts will diversify the program and increase the options for users, but it is complicated to investigate newly started programs among many programs. Operation is required.
As described above, an object of the present invention is to provide a digital broadcast receiver that can easily select a channel even if there is a change in channel title information or a newly started program. is there.
[0004]
[Means for solving the problems]
According to the present invention, according to the present invention, there is provided a reception frequency of a receiving station and a memory capable of storing at least channel title information corresponding to the reception frequency, and the desired channel title information is stored using the channel title information stored in the memory. In a digital broadcast receiver capable of receiving the selected program, a search means for searching for a reception frequency band every predetermined time, a frequency of a receiving station received by the search means, and channel title information thereof but the receiving frequency stored in said memory, determining means for determining whether to match the channel title information, match the receiving frequency by the determining means, when the corresponding channel title information are different, The previous channel title information is updated to new channel title information, and the reception frequency that matches the memory is updated. If not standing is achieved by having a control means for adding the reception frequency and channel title information of the receiving station in association the memory.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
(A) General Description of the Present Invention FIG. 1 is a schematic explanatory diagram of channel title information update control according to the digital broadcast receiver of the present invention. First, as shown in (a), the broadcasting station defines the Pty code and the corresponding program content as sports if Pty is 1, for example, news if it is 2. Also, the channel title representing the program content that is subdivided from PTY can be freely changed by the broadcasting station. For example, in the sport of PTY1, it can be Serie A, Premier League, or the like. The broadcasting station broadcasts various types of information including these pieces of information on a digital broadcast. The digital broadcast receiver can receive these pieces of information included in the digital broadcast and store them in a list as shown in (b).
[0006]
In the present invention, for example, when a broadcasting station having a transmission frequency of 78.6 MHz changes the channel title of PTY code: 1, program content: sports from Serie A to Premier League, as shown in (c), the digital broadcast receiver The channel title corresponding to the reception frequency 78.6 MHz of the list is updated from Serie A to the Premier League. Further, as shown in (d), when a transmission frequency of 88.3 MHz, PTY code: 4, program content: movie, channel title: Western movie is newly started, the reception frequency: 88 is displayed in the list as shown in (c). .3 MHz, channel title: foreign film, Pty: 4 are added.
[0007]
(B) Embodiment of the present invention (a) Configuration of digital broadcast receiver of the present invention FIG. 2 is a block diagram of the digital broadcast receiver of the present invention. In the figure, 11 is an antenna, 12 is a digital broadcast receiving unit that receives a desired digital broadcast via the antenna 11, restores and outputs high-efficiency code data (MPEG data, etc.) included in the broadcast, and 13 is a digital broadcast. An amplifier that amplifies and outputs an analog audio signal demodulated by the receiver, 14 is a speaker that outputs audio, 15 is a control of the receiver, and stores information such as reception frequency and channel title in a memory described later. A processor (CPU) for controlling, a display unit 16 for displaying the frequency of the receiving station, etc., and an operation unit 17 for selecting a channel and adjusting a volume.
[0008]
As shown in the figure, the digital broadcast receiving unit 12 includes an RF unit 12a, an A / D converter 12b, a demodulation unit 12c, an error correction unit 12d, an MPEG unit 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 demodulator 12c demodulates the digital data and outputs MPEG data or the like. The error correction unit 12d performs error correction processing on the demodulated MPEG data, and the MPEG unit 12e converts the MPEG data and the like input from the error correction unit 12d into original digital audio data. The D / A converter 12f converts digital audio data into an analog audio signal.
[0009]
As shown in the figure, the CPU 15 includes a memory 15a, a search unit 15b, a reception frequency / channel title information determination unit 15c, and the like. The memory 15a stores channel title information corresponding to the reception frequency of the receiving station and the reception frequency. The search unit 15b searches the reception frequency band every predetermined time. The reception frequency / channel title information determination unit 15c determines whether the frequency and channel title information of the receiving station received by the search unit 15b matches the reception frequency and channel title information stored in the memory 15a.
Then, the CPU 15 updates the previous channel title information to new channel title information and matches the memory when the reception frequency matches by the reception frequency / channel title information determination unit 15c and the corresponding channel title information is different. When there is no reception frequency, control is performed to store the reception frequency of the receiving station and channel title information in association with each other in the memory 15a.
[0010]
(B) Frame structure FIG. 3 is an explanatory diagram of the frame structure of mode 2 employed in the digital broadcast receiver. One frame is composed of a 2-symbol synchronization signal SYNC, a 3-symbol high-speed information channel FIC, and a 72-symbol data field DFL. The synchronization signal SYNC includes a null symbol used for recognizing 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 broadcast signals of predetermined services and announcements are inserted into the respective data fields, so that a plurality of services can be received simultaneously from one broadcast wave. ing. Which service corresponds to which data field is designated by the service arrangement data included in the high-speed information channel FIC, and the channel title is also included here.
[0012]
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 includes a FIG type indicating the type of data included in the FIG data field and a Length indicating the byte length of the FIG data field. Further, the first byte of the FIG data field has different contents for each FIG type, and an extension is included in a part thereof.
[0013]
For example, in the case of a type 0 field, the first 1 byte of the FIG data field includes a C / N (Current / Next) flag, an OE (Other Ensemble) flag, a P / D flag, and an extension in order from the top. ing. The details of the data included in the FIG data field are defined by the FIG type and the extension. Hereinafter, for example, a data field corresponding to the extension 3 of the FIG type 0 field is represented as FIG (0/3).
[0014]
Further, the data field FIG (1/1) corresponding to the extension 1 of the FIG type 1 field includes data such as SId indicating the service ID of the program and the character field containing the name of the channel title.
[0015]
The area excluding the first byte of the FIG data field contains various data specified by the FIG type and the extension, and various reception controls can be performed by reading out this data. For example, FIG (0/17) includes a program type PTy corresponding to each service.
[0016]
(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 channel title information corresponding to the frequency in the memory 15a (step 102). Next, the search frequency band is searched by the search unit 15b every predetermined time, for example, every 24 hours (step 103), and the reception frequency / channel title information determination unit 15c determines whether or not the received frequency is stored in the memory 15a. (Step 104). Thereafter, if the reception frequency does not exist in the memory 15a based on the determination result, the reception frequency and channel title information corresponding to the reception frequency are stored in the memory 15a (step 105). On the other hand, when the reception frequency exists, it is checked against channel title information corresponding to the reception frequency (step 106). Next, it is determined whether or not the channel title information matches (step 107). 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 15a (step 109).
In the embodiment of the present invention, the reception frequency and channel title information are used, but a combination of a code for identifying a channel and a channel title is also possible.
[0017]
【The invention's effect】
As described above, according to the present invention, the reception frequency of the receiving station, the memory capable of storing at least channel title information corresponding to the reception frequency, the search means for searching the reception frequency band every predetermined time, and the search means A determination means for determining whether or not the frequency of the received receiving station and at least the channel title information match the reception frequency and at least the channel title information stored in the memory, and the reception frequency matches by the determination means. If the channel title information to be used is different, the previous channel title information is updated to new channel title information, and if there is no matching reception frequency in the memory, the reception frequency of the receiving station is associated with the channel title information. And control means for storing in the memory. A broadcast channel title information and new of which are easily tuning. And the contents can be notified easily.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of the present invention.
FIG. 2 is a block diagram of a digital broadcast receiver according to the present invention.
FIG. 3 is an explanatory diagram of a frame structure.
FIG. 4 is a flowchart of a channel title information update method according to the present invention.
[Explanation of symbols]
Pty program type

Claims (1)

A receiving station having a receiving frequency and a memory capable of storing at least channel title information corresponding to the receiving frequency, selecting a desired program using the channel title information stored in the memory , and selecting the selected program; In a digital broadcast receiver capable of receiving
Search means for searching for a reception frequency band every predetermined time;
The frequency of the receiving station received by said search means, the channel title information, the receiving frequency stored in said memory, determining means for determining whether to match the channel title information,
When the reception frequency matches by the determination means and the corresponding channel title information is different, the previous channel title information is updated to new channel title information, and when there is no reception frequency matching the memory, the reception Control means for associating the reception frequency of the station with channel title information and adding it to the memory;
A digital broadcast receiver comprising:

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