JP3863742B2 - Digital / analog broadcast receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a digital / analog broadcast receiving apparatus capable of receiving both digital broadcasts and analog broadcasts.
[0002]
[Prior art]
A digital broadcast receiver that receives a digital broadcast using a satellite or a terrestrial wave selects an arbitrary broadcast wave from a plurality of broadcast waves received through a dedicated antenna or a terrestrial antenna using a digital tuner. An arbitrary channel is selected from among a plurality of channels included in the broadcast wave by demultiplexing processing, a digital signal of the selected channel is taken out and decoded to output a video / audio signal.
[0003]
A digital / analog broadcast receiving apparatus including a digital tuner for receiving digital television broadcasts and an analog tuner for receiving conventional analog broadcasts can be configured.
[0004]
[Problems to be solved by the invention]
By the way, for analog broadcasting, in a receiving apparatus that receives a television signal multiplexed with character information, station name information on the broadcast station side included in the character information is detected, and a channel position determined in advance based on the station name information. Has been proposed (see Japanese Patent Application Laid-Open No. 10-294903: IPC H04 5/44).
[0005]
However, the above-described conventional technology cannot cope with a request that the user wants to operate the analog broadcast and the digital broadcast in a situation where the broadcast is mixed without the user being aware of the mixture. That is, the user recognizes whether the program he / she wants to watch is an analog broadcast or a digital broadcast, gives a mode switching command to the broadcast receiving apparatus, for example, sets the apparatus to the analog broadcast reception mode. An operation of giving a channel number to the apparatus is required.
[0006]
In view of the above circumstances, an object of the present invention is to provide a digital / analog broadcast receiving apparatus capable of realizing an operation of switching channels without being conscious of the situation even when analog broadcast and digital broadcast are mixed. And
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, a digital / analog broadcast receiving apparatus according to the present invention is a digital / analog broadcast receiving apparatus including both a digital tuner that receives a digital broadcast and an analog tuner that receives an analog broadcast. A first CPU in charge of stationed judgment processing by the first CPU, a first memory having an information storage area corresponding to the position number and storing broadcast station information under the control of the first CPU, and a stationed judgment by an analog tuner A second CPU in charge of processing, and a second memory having an information storage area corresponding to the position number and storing broadcast station information under the control of the second CPU. Based on the notification process between the first CPU and the second CPU, information on each other is sent to the corresponding position. Held in the information storage area of the number, and when performing the information interchange between positions in one memory side, characterized in that in the other memory side is configured to perform interchange information between the corresponding positions.
[0008]
With the above configuration, the first memory that stores the broadcast station information obtained by the stationed judgment process by the digital tuner and the second memory that stores the broadcast station information obtained by the stationed judgment process by the analog tuner. The memory has information on the other party in the information storage area of the corresponding position number based on the notification process between the first CPU and the second CPU, and information exchange between positions is performed on one memory side. In some cases, information is exchanged between corresponding positions on the other memory side, so that both memories can be used for both the exchange of positions between analog broadcasts, the exchange of positions between digital broadcasts, and the exchange of positions between analog broadcasts and digital broadcasts. The correspondence between the two will be maintained, and users will be mixed with analog and digital broadcasting It is possible to perform operations such as also replace the channel without being aware of it under the circumstances that.
[0009]
The second CPU receives an information exchange instruction from the user, the second CPU performs information exchange control between positions with respect to the second memory, and notifies the first CPU of an exchange command, and the first CPU positions the first memory with respect to the position. It may be configured to perform information exchange control in between. Further, a mode for accepting a position change on a channel list image arranged in the order of positions may be formed, and information exchange between positions may be executed based on information input by a user.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0011]
FIG. 1 is a block diagram showing a European-compatible broadcast receiving apparatus 20 that allows a user to arbitrarily view terrestrial digital broadcasts and terrestrial analog broadcasts. The broadcast receiving apparatus 20 includes an analog module 18 for receiving an analog broadcast and a digital module 19 for receiving a digital broadcast.
[0012]
The terrestrial antenna 1 receives a terrestrial broadcast wave and gives a received signal to the analog tuner 2 and the digital tuner 3. Each tuner includes a channel selection processing circuit, a mixer (mixer), and the like. The mixer mixes the signal of the desired channel and the local oscillation signal to generate an intermediate frequency signal. The circuit that generates the local oscillation signal includes, for example, a variable-capacitance diode whose capacitance changes depending on the applied voltage, and is changed according to the signal of the desired channel so that a signal with a constant intermediate frequency is output from the mixer. Generate a local oscillation signal. The channel selection processing circuit receives applied voltage (tuning voltage) data corresponding to each channel, converts the data into a voltage value, and supplies the voltage value to the variable capacitance diode.
[0013]
Further, the analog module 18 extracts teletext information (for example, superimposed on the 6th to 22th scanning lines) included in the television signal and supplies it to a teletext decoder (not shown). This teletext decoder can extract station name information (8/30 format 1 (European teletext format) and provide it to the analog CPU 6. The station name information is, for example, a 4-digit number string. By providing a correspondence table with name character strings (for example, character strings such as BBC1 and CH4, which are referred to as CH.ID (see FIG. 7)), station name character strings based on station name information The analog module 18 includes an analog OSD (on-screen display) circuit (not shown), and is a bitmap based on character information output from the analog CPU 6. Data can be incorporated into the display video.
[0014]
The digital module 19 includes a demultiplexer (DEMUX), an AV decoder, and the like (not shown). The demultiplexer extracts an MPEG (Moving Picture Experts Group) video stream and audio stream from the transport stream output from the digital tuner 2 and also separates ESG (EVENT SCHEDULE GUIDE) and the like. The demultiplexer supplies the video stream and the audio stream to the AV decoder, and supplies ESG to the digital CPU 9. The digital module 19 is provided with an OSD circuit (not shown) so that bitmap data based on character information instructed to be output from the digital CPU 9 is incorporated into the display video.
[0015]
The picture tube 11 displays analog broadcast reception video or digital broadcast reception video supplied via the signal changeover switch 10. The operation of the signal changeover switch 10 is performed by the analog side CPU 6. In the channel selection state by the analog tuner 2, the signal changeover switch 10 is switched to the analog side, and in the channel selection state by the digital tuner 3, the signal changeover switch 10 is switched to the digital side. It is like that.
[0016]
The analog side CPU 6 controls the tuning of the analog tuner 2, controls the writing / reading of tuning information to the analog side memory (EEPROM, etc.) 7, and the like based on the instruction contents from the remote control transmitter 4 and the key input unit 5. Perform the process. When the instruction content relates to digital broadcasting, the analog CPU 6 transmits the instruction content to the digital CPU 9.
[0017]
The digital-side CPU 9 performs control related to digital broadcasting, such as tuning control for the digital tuner 3, control of writing / reading tuning information to the digital-side memory (EEPROM, etc.) 8, control for the demultiplexer and AV decoder, etc. It has become. Various information is exchanged between the digital CPU 9 and the analog CPU 6.
[0018]
The analog memory 7 has an information storage area with position numbers 1 to 99, for example. As shown in FIG. 5, position numbers 81 to 99 are assigned as information storage areas for analog broadcasting during auto-tuning, and position numbers 91 to 96 are designated positions. The designated position numbers 91 to 96 are assigned so as to store information on predetermined broadcasting stations.
[0019]
Similarly, the digital memory 8 has information storage areas for position numbers 1 to 99. Position numbers 1 to 80 are assigned as information storage areas for digital broadcasting.
[0020]
Next, auto tuning / auto sorting processing in the digital / analog broadcast receiving apparatus 20 will be described. When auto tuning / auto sorting is instructed by the remote control transmitter 4 or the like, the analog side CPU 6 instructs the digital side CPU 9 to start auto tuning of digital broadcasting. As shown in the flowchart of FIG. 2, the digital module 19 starts the auto-tuning process from the channel with the lowest frequency (UHF 21 station) (step S1), and determines the presence or absence of digital broadcasting (step S2). If there is no digital broadcast, it is determined whether or not it is the last channel (step S4). If it is not the last channel, the channel number is set one higher (step S5), and the process returns to step S2. If there is digital broadcasting, information such as a broadcasting station name and a transmission channel is extracted based on ESG and stored in position numbers 1 to 80 (POS1 to POS80) of the digital memory 8 (step S3). move on. The above information includes a Handle No. for determining whether the broadcast is analog broadcast or digital broadcast on the digital module 19 side. (Indicated as HD NO. In FIG. 4) is added. The position at which the digital broadcast information is stored is notified from the digital side CPU 9 to the analog side CPU 6.
[0021]
When the digital broadcast auto-tuning is completed (YES in step S4), the digital CPU 9 notifies the analog CPU 6 that the search is completed. The analog module 18 starts the auto-tuning process from the channel with the lowest frequency (UHF21 station) (step S6), and determines whether analog broadcasting is present (step S7). If there is no analog broadcast, it is determined whether or not it is the last channel (step S9). If it is not the last channel, the channel number is set one higher (step S10), and the process returns to step S7. If there is an analog broadcast, information such as station name information and transmission channel is extracted from the text broadcast packet, the transmission channel number and tuning information are stored in the analog side memory 7 (step S8), and the process proceeds to step S9. In the analog-side memory 7, as shown in FIG. 5, the designated position numbers 91 to 96 are assigned so as to store predetermined broadcast station information, so that the broadcast station name indicates “BBC1”. In this case, information is stored in the position 91, and in the case where the broadcast station name indicates “BBC2”, the information is stored in the position 92. On the other hand, if the broadcast station name is not a predetermined broadcast station, information is stored in vacant positions in order from the non-designated position 81. In addition, even when the same broadcast station is detected after the predetermined broadcast station is found, information is stored in vacant positions in order from the non-designated position 81. Also, the analog side CPU 6 is a broadcasting station name (character information representing the station name) obtained based on the station name information extracted from the text broadcast packet. The ID is transmitted to the digital CPU 9 together with the position number. The digital CPU 9 stores the broadcast station name at the corresponding position in the digital memory 8.
[0022]
Here, as shown in FIG. 3, digital broadcasting exists in UHF station 23 and UHF station 28, UHF station 29 (referred to as broadcast station CH4), UHF station 32 (referred to as broadcast station BBC1), and UHF station 41 (referred to as broadcast station BBC2). And UHF47 station (broadcasting station ITV), assuming that analog broadcasting exists, information about UHF23 station and UHF28 station is stored in the digital-side memory 8 by the above-mentioned digital broadcasting auto-tuning. Is transmitted to the analog side CPU 6, and information about the UHF 29 station, the UHF 32 station, the UHF 41 station, and the UHF 47 station is stored in the analog side memory 7 by the next analog broadcast auto-tuning, and this stored information is transmitted to the digital side memory 8. Will be.
[0023]
When the analog broadcast auto-tuning is completed (YES in step S9), it is determined whether or not all the position numbers 1 to 6 in the digital-side memory 8 are free (step S11). If the determination is YES, the information of the position numbers 91 to 96 is copied to the position numbers 1 to 6 of the analog side memory 7 (step S12). On the other hand, if NO is determined, it is determined whether or not some of the position numbers 1 to 6 are vacant in the digital memory 8 (step S13). If the determination is YES, the information of the position numbers 91 to 96 is copied to the vacant positions of the analog memory 7 with the position numbers 1 to 6 (step S14). Specifically, if the position number 3 in the digital memory 8 is empty, the information of the position number 93 in the analog memory 7 is copied to the position number 3 in the analog memory 7. Similarly, if the position number 4 in the digital memory 8 is empty, the information on the position number 94 in the analog memory 7 is copied to the position number 4 in the analog memory 7.
[0024]
If NO is determined in step S13, information is stored in all the position numbers 1 to 6 of the digital side memory 8. In such a case, the copy processing in the analog side memory 7 is not performed, and the automatic processing is performed. The tuning / auto-sorting process is terminated.
[0025]
Here, if it is assumed that the digital broadcast could not be received at all, A in FIG. 6 (in this figure, the position number on the analog side and the position number on the digital side are not shown separately but are shown in a superimposed form). As shown in the row, information of designated position numbers 91 to 96 is copied to position numbers 1 to 6, and information of undesignated position numbers 81 to 83 is copied to position numbers 7 and later as an example. .
[0026]
Also, if all digital broadcasts can be received, position numbers 1 to 9 are occupied by digital broadcast information as shown in line B of FIG. BBC is a multiplex broadcast of “BBC1”, “BBC2”, “BBC news”, and “BBC choice”, and each channel occupies one position even if the channel number (CH.NO.) is the same ( (See FIG. 4).
[0027]
If a part of the digital broadcast can be received, position numbers 1, 2, 6, 7, and 8 are occupied by the digital broadcast information as shown in line C in FIG. As an example, information of position numbers 93, 94, and 95 is copied to 3, 4, and 5.
[0028]
The contents of the sorting are transmitted from the analog side CPU 6 to the digital side CPU 9, and the digital side CPU 9 stores information in the corresponding position of the digital side memory 8.
[0029]
FIG. 7 shows information storage contents of the analog side memory 7 and the digital side memory 8 in correspondence with the C line of FIG. In each memory, information on whether each position is digital broadcasting or analog broadcasting (“D / A” in the analog side memory, “D / A” in the analog side memory, “in the digital side memory”, by mutual notification between the analog side CPU 6 and the digital side CPU 9. handle No. ") and station name information and the like are stored. Thus, by having the information on the other party on the position series common to each memory side, for example, in the screen display of the channel list (broadcast station list) in the order of position by the on-screen display under the control of the analog side CPU 6. Digital broadcast station information can also be displayed, and analog broadcast station information can be displayed on the screen display of the channel list (broadcast station list) in order of position by the on-screen display under the control of the digital CPU 9. Will be able to.
[0030]
The tuning procedure after the end of the auto tuning / auto sorting process will be described. If, for example, position number 3 (POS3) is selected by the remote control transmitter 4 or the like, the analog side CPU 6 can grasp that the position number 3 is UHF47 station by analog broadcasting based on the memory contents of FIG. The UHF 47 station is selected and an analog broadcast video is displayed on the picture tube 11. Since the analog side CPU 6 receives instructions from the remote control transmitter 4 and the like, the channel selection operation on the digital module 19 side is not performed when the above-mentioned analog broadcast is selected, but the analog side CPU 6 is connected to the digital side CPU 9. On the other hand, an instruction to prohibit the channel selection operation may be issued.
[0031]
When, for example, position number 2 (POS2) is selected by the remote control transmitter 4 or the like, the analog side CPU 6 can grasp that the position number 2 is digital broadcasting based on the memory contents of FIG. And the channel selection request on the digital module 19 side are transmitted to the digital CPU 9. In this case, the channel selection operation on the analog module 18 side is not performed. The digital side CPU 9 recognizes that “BBCtwo” of the digital broadcast exists in the UHF 23 station based on the stored information of the position number 2 in the digital side memory 8 and executes the channel selection operation.
[0032]
FIG. 8 is a flowchart showing the processing contents of channel replacement (position replacement) performed mainly by the analog side CPU 6. FIG. 9A shows the contents of the analog side memory and the digital side memory before replacement, and FIG. 9B shows the contents of the analog side memory and the digital side memory after replacement.
[0033]
The analog side CPU 6 determines whether or not there is a channel replacement request (step S21). For example, when a channel change request is prepared, for example, an item such as “channel change” is prepared on the menu screen, and the cursor is placed on this item and the determination key of the remote control transmitter 4 is operated, it is determined that the request has been made. Is done. When this request is made, a replacement position input screen is displayed (step S22), and an input of a replacement position number is accepted (step S23). The replacement position input screen is, for example, as shown in FIG. If this screen is displayed, the user uses the remote control transmitter 4 to switch the positions “2” and “4”. Use to enter.
[0034]
For example, when the analog side CPU 6 obtains the information “2” and “4”, the analog side memory 7 executes a process of switching the broadcast station information at position 2 and the broadcast station information at position 4 in the analog side memory 7 (step S24). ). Then, it instructs the digital CPU 9 to replace the position (step S25). The digital side CPU 9 obtains the information “2” and “4” from the analog side CPU 6, and executes the process of switching the broadcast station information at position 2 and the broadcast station information at position 4 in the digital side memory 8. The completion is notified to the analog side CPU 6. When the analog CPU 6 receives a completion notification (YES in step S26), the replacement process is terminated.
[0035]
In the above position change operation, an item such as “Channel change” is prepared on the menu screen, and when the cursor is placed on this item and the determination key of the remote control transmitter 4 is operated, the request is made. Although the replacement position input screen is displayed after determination, for example, a position replacement operation may be accepted on the screen display of the channel list (broadcast station list) in the order of positions on the on-screen display under the control of the analog side CPU 6. Good. In this display state, analog broadcasts and digital broadcasts are mixedly displayed on one position series, so it is easy for the user to come up with a channel change at this time, and the user confirms the channel (broadcast station) that is the target of the position change. However, it is possible to input a number for replacement.
[0036]
【The invention's effect】
As described above, according to the present invention, it is possible to realize an operation of switching channels without being aware of this even in a situation where analog broadcasting and digital broadcasting are mixed.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital / analog broadcast receiving apparatus according to an embodiment of the present invention;
FIG. 2 is a flowchart showing a processing procedure of auto tuning / auto sorting.
FIG. 3 is an explanatory diagram exemplifying a presence form of a broadcasting station.
FIG. 4 is an explanatory diagram showing that a digital broadcast is placed in a designated position in advance based on its station name.
FIG. 5 is an explanatory diagram showing that an analog broadcast is placed in a designated position in advance based on its station name.
FIG. 6 is an explanatory diagram showing an example of each position state when only analog broadcasting is received, when all digital broadcasting is received, and when only part of digital broadcasting is received.
7 is an explanatory diagram showing information storage contents of an analog side memory and a digital side memory when only a part of the digital broadcast of FIG. 6 is received.
FIG. 8 is a flowchart showing processing details of channel replacement.
FIG. 9A is an explanatory diagram showing the memory contents before replacement, and FIG. 9B is an explanatory diagram showing the memory contents after replacement.
FIG. 10 is an explanatory diagram showing an example of an operation guide screen for channel replacement.
[Explanation of symbols]
1 Antenna 2 Analog Tuner 3 Digital Tuner 6 Analog Side CPU
7 Analog side memory 8 Digital side CPU
9 Digital side memory 18 Analog module 19 Digital module

Claims (3)

In a digital / analog broadcast receiving apparatus having both a digital tuner for receiving digital broadcasts and an analog tuner for receiving analog broadcasts, a first CPU that is in charge of the determination processing of the station by the digital tuner and an information storage area corresponding to the position number A first memory in which broadcast station information is stored under the control of the first CPU, a second CPU in charge of stationed judgment processing by the analog tuner, and an information storage area corresponding to the position number, A second memory in which broadcast station information is stored under the control of the second CPU, and the first memory and the second memory are based on a notification process between the first CPU and the second CPU. Information is stored in the information storage area of the corresponding position number, and information is exchanged between positions on one memory side When performing, the other digital-to-analog broadcast receiving apparatus characterized by being configured to perform interchange information between the corresponding positions in the memory side. 2. The digital / analog broadcast receiving apparatus according to claim 1, wherein the second CPU receives an information exchange instruction from a user, and the second CPU performs information exchange control between positions with respect to the second memory, and also performs an exchange instruction to the first CPU. The digital / analog broadcast receiving apparatus is characterized in that the first CPU is configured to control information exchange between positions with respect to the first memory. 3. The digital / analog broadcast receiving apparatus according to claim 1, wherein a mode for accepting a position change is formed on a channel list image arranged in the order of positions, and the positions between positions are determined based on information inputted by a user. A digital / analog broadcast receiving apparatus configured to perform information exchange.

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