JP2009105793A - Digital broadcasting receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a digital broadcasting receiver capable of updating a channel map with satisfactory convenience. <P>SOLUTION: An MPU 11 of the digital broadcasting receiver has: a table acquisition section 112 for acquiring NIT information included in the television broadcasting of a frequency band 1 via a reception section 14 for each preset and prescribed time; an identification information acquisition section 113 for acquiring a logical channel identification information, based on the acquired NIT information; an identification information determination section 114 for determining whether the acquired logical channel identification information coincides with that stored in the channel storage section 121; and an identification information update section 115 for changing the logical channel identification information acquired by the identification information acquisition section 113 to that stored in the channel storage section 121 for recording in the channel storage section 121 when it is determined that the acquired logical channel identification information does not coincide with that stored in the channel storage section 121. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a digital broadcast receiving apparatus that receives a digital television broadcast and is connected so that the received video information can be displayed on a monitor.

  A broadcast receiver configured to receive a television broadcast and output it to a monitor so that it can be seen from the outside can scan the reception frequency from, for example, the lower to the higher, and receive the television broadcast. It has a channel preset function for registering channels in an internal memory as a so-called channel map.

In order to efficiently perform the channel preset, various apparatuses, methods, and the like have been proposed. For example, a receiving apparatus is disclosed in which channels are registered in the channel map when they are registered in units of physical channels, and when they are deleted, they are deleted in units of subchannels (see Patent Document 1). According to the above-described receiving apparatus, it is possible to save time and effort for registering channels in the channel map, and it is possible to register only channels that meet the user's preference in the channel map.
JP 2002-344832 A

  However, in the conventional broadcast receiving apparatus such as the above-described receiving apparatus, although the channel can be registered in the channel map by the channel preset function, it is necessary to execute the channel preset function again when the channel configuration changes. In some cases, it took a lot of time. In addition, since the user cannot recognize whether or not the channel configuration has changed, there are cases where the desired program cannot be viewed even if the channel corresponding to the program that the user desires to view is set.

  The present invention has been made in view of the above problems, and an object thereof is to provide a digital broadcast receiver capable of updating a channel map with good convenience.

  In order to achieve the above object, the digital broadcast receiving apparatus according to claim 1 is a digital broadcast receiving apparatus connected to be capable of receiving a digital television broadcast and displaying the received video information on a monitor. The service corresponding to the logical channel includes receiving means for receiving a television broadcast of a preset frequency band, and logical channel identification information which is information for identifying a logical channel corresponding to one service displayed on the monitor. Channel storage means for storing in advance in association with physical channel identification information, which is information for identifying a physical channel corresponding to one receivable frequency band, and receiving an operation input from the outside, and based on the received operation input One logical channel to be displayed on the monitor is set, and the receiving means is set. Channel setting means for receiving one frequency band in which a service corresponding to the one logical channel can be received, and a television of the one frequency band via the receiving means at predetermined time intervals. Table acquisition means for acquiring network information table (NIT) information included in the broadcast, identification information acquisition means for acquiring logical channel identification information based on the NIT information acquired by the table acquisition means, and acquisition of the identification information The logical channel identification information acquired by the means is determined not to match by the identification information determination means for determining whether or not the logical channel identification information stored in the channel storage means matches the logical channel identification information. In the case acquired by the identification information acquisition means The physical channel identification information, instead of the logical channel identification information stored in the channel storing means, characterized by and an identification information updating means for recording the channel memory means.

  The digital broadcast receiving apparatus according to claim 2 is the digital broadcast receiving apparatus according to claim 1, wherein the identification information acquisition unit corresponds to a logic channel corresponding to a logical channel received via the first frequency band. It is characterized by acquiring channel identification information.

  The digital broadcast receiver according to claim 3 is the digital broadcast receiver according to claim 2, wherein the table acquisition means acquires NIT (actual) information which is NIT information related to the selected network. The identification information acquisition unit acquires the logical channel identification information of the Logical_channel_descriptor included in the NIT (actual) information acquired by the table acquisition unit.

  The digital broadcast receiving apparatus according to claim 4 is the digital broadcast receiving apparatus according to claim 1, wherein the identification information acquisition unit transmits a broadcast tower transmitting the television broadcast of the first frequency band. All the logical channel identification information transmitted from a plurality of broadcast towers is acquired.

  The digital broadcast receiver according to claim 5 is the digital broadcast receiver according to claim 4, wherein the table acquisition unit acquires NIT (other) information that is NIT information related to another network, and The identification information acquisition unit acquires the logical channel identification information of Logical_channel_descriptor included in the NIT (other) information acquired by the table acquisition unit.

  A digital broadcast receiving apparatus according to claim 6 is the digital broadcast receiving apparatus according to any one of claims 1 to 5, wherein when it is determined by the identification information determination means that they do not match, a logical channel It is characterized by comprising display control means for displaying information indicating that the identification information has been updated on the monitor so as to be visible from the outside.

  According to the digital broadcast receiving apparatus of the first aspect, the logical channel identification information, which is information for identifying the logical channel corresponding to one service displayed on the monitor, is one in which the service corresponding to the logical channel can be received. Corresponding to physical channel identification information, which is information for identifying a physical channel corresponding to a frequency band, is stored in advance in the channel storage means, accepting an operation input from the outside, and based on the accepted operation input, One logical channel to be displayed on the monitor is set, and a service corresponding to the set one logical channel can be received via a receiving means for receiving a television broadcast of a preset frequency band. A frequency band is received. Then, NIT (Network Information Table) information included in the television broadcast of one frequency band is acquired through a receiving unit at predetermined time intervals set in advance, and a logical channel is acquired based on the acquired NIT information. Identification information is acquired. Further, it is determined whether or not the acquired logical channel identification information matches the logical channel identification information stored in the channel storage means, and when it is determined that they do not match, the acquired logical channel identification information is Since it is recorded in the channel storage means instead of the logical channel identification information stored in the channel storage means, the channel map can be updated with good convenience.

  That is, NIT information included in a television broadcast of one frequency band corresponding to one logical channel set based on an external operation input is acquired and acquired every predetermined time set in advance. Based on the NIT information, logical channel identification information is acquired, and when it is determined that the acquired logical channel identification information does not match the logical channel identification information stored in the channel storage means, the acquired logical channel identification Since the information is recorded in the channel storage means instead of the logical channel identification information stored in the channel storage means, the user does not perform any operation input every time the broadcast logical channel identification information is updated. The logical channel identification information stored in the channel storage means is updated (= the channel map is updated). Since to), it is possible to update the convenience good channel map.

  According to the digital broadcast receiving apparatus of claim 2, the logical channel identification corresponding to the logical channel received through one frequency band corresponding to one logical channel set based on an external operation input. Since the information is acquired, the channel map can be updated more conveniently.

  That is, each time a logical channel on which a program desired by the user is broadcast is set, logical channel identification information corresponding to the logical channel received through one frequency band corresponding to the set one logical channel. Therefore, since the channel map relating to the logical channel on which the program desired by the user is broadcast is reliably updated, the channel map can be updated more conveniently.

  According to the digital broadcast receiving apparatus according to claim 3, NIT (actual) information that is NIT information related to the selected network is acquired, and the logical channel identification information of the Logical_channel_descriptor included in the acquired NIT (actual) information. Therefore, the channel map can be updated efficiently.

  That is, Logical_channel_descriptor logical channel identification information (= logical_channel_1.1_68.E1_3.68_4) is a logical channel identification information of logical_channel_descriptor (= logical_channel_1.68 ET4) in the ETSI (European Communications Standards Institute), which is a European digital broadcasting standard. 2004-06) and IEC (International Electrotechnical Commission) 62216-1 (Draft Version 2.0.2)) are acquired, and therefore, through one frequency band corresponding to one set logical channel. Corresponds to all logical channels received Since the physical channel identification information can be obtained reliably, it is possible to efficiently update the channel map.

  The digital broadcast receiver according to claim 4 includes a plurality of broadcast towers that transmit a television broadcast of one frequency band corresponding to one logical channel set based on an operation input from the outside. Since all the logical channel identification information transmitted from the broadcasting tower is acquired, the updated logical channel identification information is acquired every time the logical channel identification information is updated on the broadcasting station side, so that it is more efficient. The channel map can be updated.

  According to the digital broadcast receiving apparatus according to claim 5, NIT (other) information that is NIT information related to another network is acquired, and logical channel identification information of Logical_channel_descriptor included in the acquired NIT (other) information is acquired. Therefore, the channel map can be updated more efficiently.

  That is, Logical_channel_descriptor logical channel identification information (= logical_channel_number) (ETSI EN 300 468 V1.6.1 (2004-06)) included in NIT (other) information defined in ETSI which is a European digital broadcasting standard, and Since IEC (International Electrotechnical Commission) 62216-1 (Draft Version 2.0.2) is acquired, it is possible to reliably acquire all logical channel identification information transmitted from a plurality of broadcast towers. In addition, the channel map can be updated more efficiently.

  According to the digital broadcast receiver of claim 6, when it is determined that the acquired logical channel identification information does not match the logical channel identification information stored in the channel storage means, the logical channel identification information is updated. Since the information to the effect is displayed on the monitor so as to be visible from the outside, the channel map can be updated more conveniently.

  That is, when it is determined that the acquired logical channel identification information does not match the logical channel identification information stored in the channel storage means (= the logical channel identification information has been updated on the broadcast station side, When the logical channel identification information has not yet been updated in the device), information indicating that the logical channel identification information has been updated is displayed on the monitor so that it can be visually recognized from the outside. Therefore, the user can visually recognize that the channel map is updated, so that the channel map can be updated more conveniently.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of a digital broadcast receiver 1 according to the present invention. A digital broadcast receiver 1 (corresponding to a digital broadcast receiver) is communicably connected to a remote controller (= remote controller: hereinafter referred to as “remote controller”) 2 via infrared communication.

  The digital broadcast receiver 1 receives an operation input from the user via the remote controller 2, receives a television broadcast, and outputs video and audio to the display 173 and the speaker 153, respectively. MPU11, RAM12 ROM 13, receiving unit 14, audio output unit 15, MPEG2 decoding unit 16, image output unit 17, and infrared communication unit 18.

  An MPU (Micro Processing Unit) 11 controls the operation of the entire digital broadcast receiver 1. A RAM (Random Access Memory) 12 stores information such as audio information and video information in a readable and writable manner. A ROM (Read Only Memory) 13 stores a control program for operating the MPU 11 and the like.

  The receiving unit 14 (corresponding to a receiving unit) receives and demodulates a television broadcast, and includes an antenna unit 141, a tuner unit 142, an A / D conversion unit 143, a demodulation unit 144, and a TS demultiplexer. 145.

  The antenna unit 141 receives a television broadcast wave. The tuner unit 142 selects a broadcast of a preset channel from the television broadcast wave received by the antenna unit 141. The A / D conversion unit 143 converts the output signal (= analog signal) from the tuner unit 142 into digital information. The demodulator 144 demodulates output information from the A / D converter 143. A TS (Transport Stream) demultiplexer 145 separates and outputs the output information demodulated by the demodulator 144 for each type.

  The audio output unit 15 outputs audio corresponding to the television broadcast received by the reception unit 14, and includes a D / A conversion unit 151, an audio signal output unit 152, and a speaker 153. The D / A converter 151 converts the audio information (= digital information) output from the TS demultiplexer 145 into an analog signal. The audio signal output unit 152 outputs the audio signal converted into an analog signal by the D / A conversion unit 151. The speaker 153 outputs audio corresponding to the audio signal output from the audio signal output unit 152.

  An MPEG (Motion Picture Experts Group) 2 decoding unit 16 decodes the video information output from the TS demultiplexer 145 into video information before compression.

  The image output unit 17 outputs the video information decoded by the MPEG2 decoding unit 16, and includes a PAL encoding unit 171, a video signal output unit 172, and a display 173. A PAL (Phase Alternating Line) encoding unit 171 converts the video information decoded by the MPEG2 decoding unit 16 into a PAL television signal. The video signal output unit 172 outputs the PAL television signal output from the PAL encoding unit 171 to the display 173. The display 173 (corresponding to a monitor) includes an LCD (Liquid Crystal Display), a PDP (Plasma Display Panel), and the like, and displays video corresponding to the television signal output from the video signal output unit 172.

  The infrared communication unit 18 receives various operations such as power ON / OFF operations, channel selection, and various settings of the digital broadcast receiver 1 from the remote controller 2. The remote controller 2 (corresponding to a part of the channel setting means) includes various keys, receives an operation input from the user through pressing of the key, generates an infrared signal corresponding to the operation input, and performs digital broadcasting. This is output to the receiver 1.

  Next, the operation when the digital broadcast receiver 1 receives a broadcast will be described. First, the transmitted digital broadcast wave is received by the antenna unit 141. When a channel selection operation is accepted via the remote controller 2, the tuner 142 switches the transponder received. The received digital broadcast wave is converted into digital information by the A / D converter 143 and demodulated by the demodulator 144.

  The digital broadcast wave is transmitted as a TS (Transport Stream) packet from the transmission side (transmission station). The TS packet includes video information, audio information, control information, and the like. These pieces of information are separated and output by the TS demultiplexer 145 and stored in the RAM 12. The audio information read from the RAM 12 is converted into an analog signal by the D / A converter 151, and the audio is output from the speaker 153 via the audio signal output unit 152.

  Also, the video information read from the RAM 12 is decoded into video information before compression by the MPEG2 decoding unit 16, converted into a PAL television signal by the PAL encoding unit 171, and then passed through the video signal output unit 172. An image is displayed on the display 173.

  FIG. 2 is a block diagram showing an example of the configuration of the main part of the digital broadcast receiver 1 according to the present invention. The MPU 11 functionally includes a channel setting unit 111, a table acquisition unit 112, an identification information acquisition unit 113, an identification information determination unit 114, an identification information update unit 115, and a display control unit 116, and the RAM 12 functionally. A channel storage unit 121 is provided.

  Here, the MPU 11 reads and executes a control program stored in advance in the ROM 13 or the like shown in FIG. 1 to execute a channel setting unit 111, a table acquisition unit 112, an identification information acquisition unit 113, an identification information determination unit 114, an identification In addition to functioning as functional units such as the information updating unit 115 and the display control unit 116, the RAM 12 functions as functional units such as the channel storage unit 121.

  Further, among the various data stored in the RAM 12 and the ROM 13 shown in FIG. 1, data that can be stored in a removable recording medium is, for example, a hard disk drive, an optical disk drive, a flexible disk drive, a silicon disk drive, a cassette medium reader, etc. In this case, the recording medium is, for example, a hard disk, an optical disk, a flexible disk, a CD (Compact Disc), a DVD (Digital Versatile Disk), a semiconductor memory, or the like.

  The channel storage unit 121 (corresponding to channel storage means) displays logical channel identification information (here, logical channel number (logical_channel_number) information) that is information for identifying a logical channel corresponding to one service displayed on the display 173. These are stored in advance in association with physical channel identification information, which is information for identifying a physical channel corresponding to one frequency band in which a service corresponding to a logical channel can be received.

  The logical channel identification information stored in the channel storage unit 121 is read by the identification information determination unit 114 and updated (= written) by the identification information update unit 115.

  The channel setting unit 111 (corresponding to a part of the channel setting means) receives an operation input from the user via the remote controller 2 and selects one logical channel to be displayed on the display 173 based on the received operation input. In addition to the setting, the receiving unit 14 (such as the tuner unit 142 shown in FIG. 1) receives one frequency band in which a service corresponding to the set one logical channel can be received.

  The table acquisition unit 112 (corresponding to the table acquisition unit) corresponds to one logical channel set by the channel setting unit 111 via the reception unit 14 every predetermined time (for example, 5 seconds) set in advance. Network information table (NIT) information included in a television broadcast of one frequency band in which the service can be received.

  Here, the table acquisition unit 112 is NIT (actual) that is NIT information regarding a selected network (= a network including a broadcast tower to which a service corresponding to one logical channel set by the channel setting unit 111 is transmitted). ) Get information.

  The identification information acquisition unit 113 (corresponding to the identification information acquisition unit) acquires logical channel identification information based on the NIT information acquired by the table acquisition unit 112. Specifically, the identification information acquisition unit 113 can receive a service corresponding to one logical channel set by the channel setting unit 111 based on NIT (actual) information acquired by the table acquisition unit 112 1 The logical channel identification information corresponding to the logical channel received via the frequency band is acquired.

  More specifically, the identification information acquisition unit 113 includes logical channel identification information (here, logical channel number (logical_channel_number) information) (ETSI EN) of the Logical_channel_descriptor included in the NIT (actual) information acquired by the table acquisition unit 112. 300 468 V1.6.1 (2004-06) and IEC (International Electrotechnical Commission) 62216-1 (Draft Version 2.0.2)).

  The identification information determination unit 114 (corresponding to the identification information determination unit) stores the logical channel identification information (here, logical channel number (logical_channel_number) information) acquired by the identification information acquisition unit 113 in the channel storage unit 121. It is determined whether or not it matches the logical channel identification information.

  FIG. 3 is a table showing an example of logical channel number information acquired by the identification information acquisition unit 113. (A) is a chart showing an example of logical channel number information stored in the channel storage unit 121, and (b) is a chart showing an example of logical channel number information acquired by the identification information acquisition unit 113. In the charts shown in (a) and (b), physical channel identification information (in this case, physical channel number information), service ID (Service id) that is identification information for identifying the contents of the service, Contains channel number information.

  In the chart shown in (a), the logical channel number corresponding to the service ID “102” is “2”, whereas in the chart shown in (b), the logical channel corresponding to the service ID “102”. Since the number is changed to “8”, the logical channel number information acquired by the identification information acquisition unit 113 by the identification information determination unit 114 does not match the logical channel number information stored in the channel storage unit 121. Determined.

  Again, the functional configuration of the MPU 11 will be described with reference to FIG. The identification information updating unit 115 (corresponding to the identification information updating unit) determines the logical channel identification information acquired by the identification information acquisition unit 113 as the channel storage unit 121 when it is determined that the identification information determination unit 114 does not match. Is recorded (= updated) in the channel storage unit 121 in place of the logical channel identification information stored in.

  In the cases shown in FIGS. 3A and 3B, in the chart shown in FIG. 3A, the logical channel number corresponding to the service ID “102” is “2”, whereas in FIG. In the illustrated chart, since the logical channel number corresponding to the service ID “102” is changed to “8”, the identification information updating unit 115 changes the logical channel number corresponding to the service ID “102” from “2”. It is updated to “8”.

  The display control unit 116 (corresponding to the display control unit) can visually recognize information indicating that the logical channel number information has been updated from the outside when the identification information determination unit 114 determines that they do not match. Is displayed.

  FIG. 4 is a screen diagram illustrating an example of a channel update screen displayed on the display 173 by the display control unit 116. On the channel update screen 300, a guidance display unit 301 is displayed in the approximate center of the screen, and a confirmation button 302 is displayed below the guidance display unit 301.

  The guidance display unit 301 displays information indicating that the logical channel number information has been updated as text information via an OSD (On-Screen Display) or the like. In this example, “the channel number has been updated. 2CH → 8CH ”is displayed. That is, in the cases shown in FIGS. 3A and 3B, the guidance display unit 301 displays that the logical channel number corresponding to the service ID “102” has been updated from “2” to “8”. . The user sets the channel number to “8” from now on, and sets the channel number to “8” in the future, based on the character information displayed on the guidance display unit 301. Can be viewed.

  The confirmation button 302 is a button that is pressed when the user deletes the channel update screen 300 (= when the content displayed on the channel update screen 300 is confirmed). When the confirmation button 302 is pressed, the channel update screen 300 is deleted by the display control unit 116, and the television broadcast video received via the normal receiving unit 14 is displayed.

  FIG. 5 is a flowchart showing an example of the operation of the digital broadcast receiver 1 (mainly the MPU 11). Here, for convenience, in the channel storage unit 121, the logical channel number information is associated with physical channel number information that is information for identifying a physical channel corresponding to one frequency band that can be received by a service corresponding to the logical channel. The case where it is stored in advance will be described.

  First, one logical channel is set by the channel setting unit 111 (S101), and one frequency band in which a service corresponding to the set one logical channel can be received is received via the receiving unit 14 ( S103). Then, NIT (actual) information is acquired by the table acquisition unit 112 via the reception unit 14 (S105). Next, the identification information acquisition unit 113 acquires logical channel number information based on the NIT (actual) information acquired in step S105 (S107).

  Next, the identification information determination unit 114 determines whether or not the logical channel number information acquired in step S107 matches the logical channel identification information stored in the channel storage unit 121 (S109). If it is determined that they match (YES in S109), the process proceeds to step S115. When it is determined that they do not match (NO in S109), the identification information update unit 115 records (= updates) the logical channel number information acquired in step S107 in the channel storage unit 121 (S111). . Then, the display control unit 116 displays the channel update screen 300 shown in FIG. 4 on the display 173 (S113).

  If YES in step S109, or if the process in step S113 ends, the table acquisition unit 112 determines whether or not a predetermined time (in this case, 5 seconds) has elapsed. (S115). If it is determined that the predetermined time has not elapsed (NO in S115), the process is set to a standby state. If it is determined that the predetermined time has elapsed (YES in S115), the process returns to step S105, and the processes after step S105 are repeatedly executed.

  In this way, logical channel identification information (here, logical channel number information), which is information identifying a logical channel corresponding to one service displayed on the display 173, can be received by the service corresponding to the logical channel. Is stored in advance in the channel storage unit 121 in association with physical channel identification information (here, physical channel number information) that is information for identifying a physical channel corresponding to the frequency band of An operation input is accepted, and one logical channel to be displayed on the display 173 is set based on the accepted operation input, and a service corresponding to the set one logical channel is received via the receiving unit 14. One receivable frequency band is received. Then, every predetermined time (here, 5 seconds), NIT (Network Information Table) information (here, NIT (actual) is included in the television broadcast of one frequency band via the receiving unit 14. ) Information) is acquired, and logical channel identification information is acquired based on the acquired NIT information. Further, it is determined whether or not the acquired logical channel identification information matches the logical channel identification information stored in the channel storage unit 121. If it is determined that the acquired logical channel identification information does not match, the acquired logical channel identification information is Since it is recorded in the channel storage unit 121 instead of the logical channel identification information stored in the channel storage unit 121, the channel map can be updated with good convenience.

  That is, every predetermined time (here, 5 seconds), a television broadcast of one frequency band corresponding to one logical channel set based on an operation input from the user via the remote controller 2 is transmitted. The included NIT information (here, NIT (actual) information) is acquired, logical channel identification information (here, logical channel number information) is acquired based on the acquired NIT information, and the acquired logical channel When it is determined that the identification information does not match the logical channel identification information stored in the channel storage unit 121, the acquired logical channel identification information is replaced with the logical channel identification information stored in the channel storage unit 121. Since it is recorded in the channel storage unit 121, every time the logical channel identification information to be broadcast is updated, The logical channel identification information stored in the channel storage unit 121 is updated without any operation input by the user (= the channel map is updated), so that the channel map can be updated with good convenience. is there.

  In addition, logical channel identification information (here, logical channel identification information corresponding to a logical channel received via one frequency band corresponding to one logical channel set based on an operation input from the user received via the remote controller 2 , Logical channel number information) is acquired, the channel map can be updated more conveniently.

  That is, each time a logical channel on which a program desired by the user is broadcast is set, logical channel identification information corresponding to the logical channel received through one frequency band corresponding to the set one logical channel. Since (here, the logical channel number information) is acquired, the channel map regarding the logical channel on which the program that the user desires to watch is broadcast is surely updated, so that the channel map is updated more conveniently. It can be done.

  Further, NIT (actual) information, which is NIT information related to the selected network (= a network including a broadcast tower to which a service corresponding to one logical channel set by the channel setting unit 111 is transmitted), is acquired and acquired. Since the logical channel identification information (here, the logical channel number (logical_channel_number) information) of the Logical_channel_descriptor included in the received NIT (actual) information is acquired, the channel map can be updated efficiently.

  That is, Logical_channel_descriptor logical channel identification information (= logical_channel_1.num_68.1_68.3_68.1_68) is the logical channel identification information (= logical_channel_1. 2004-06) and IEC (International Electrotechnical Commission) 62216-1 (Draft Version 2.0.2)) are acquired, and therefore, through one frequency band corresponding to one set logical channel. Corresponds to all logical channels received Since the physical channel identification information can be obtained reliably, it is possible to efficiently update the channel map.

  In addition, when it is determined that the obtained logical channel identification information (here, logical channel number information) does not match the logical channel identification information stored in the channel storage unit 121, the logical channel identification information is updated. Is displayed on the display 173 so as to be visible from the outside (see FIG. 4), so that the channel map can be updated more conveniently.

  That is, when it is determined that the acquired logical channel identification information (here, logical channel number information) does not match the logical channel identification information stored in the channel storage unit 121 (= logical channel identification information on the broadcasting station side). Is updated but the logical channel identification information has not been updated yet in the digital broadcast receiver 1), information indicating that the logical channel identification information has been updated is displayed on the display 173 so as to be visible from the outside. Therefore, since the user can visually recognize that the logical channel identification information has been updated, the channel map can be updated more conveniently.

The present invention can also be applied to the following forms.
(A) In the present embodiment, the case where the digital broadcast receiving apparatus is the digital broadcast receiver 1 that receives a digital broadcast has been described. However, the digital broadcast receiving apparatus may receive a digital broadcast and an analog broadcast.

  (B) In this embodiment, the MPU 11 includes functional units such as a channel setting unit 111, a table acquisition unit 112, an identification information acquisition unit 113, an identification information determination unit 114, an identification information update unit 115, and a display control unit 116. However, at least one functional unit among the channel setting unit 111, the table acquisition unit 112, the identification information acquisition unit 113, the identification information determination unit 114, the identification information update unit 115, and the display control unit 116 is a circuit. The form implement | achieved by the hardware of these may be sufficient.

  (C) In this embodiment, the table acquisition unit 112 acquires NIT (actual) information, and the identification information acquisition unit 113 can receive a service corresponding to one logical channel set by the channel setting unit 111. Although the case where logical channel identification information corresponding to a logical channel received via one frequency band is acquired has been described, the table acquisition unit 112 acquires NIT (other) information, and the identification information acquisition unit 113 All logical channel identification information transmitted from a plurality of broadcast towers including a broadcast tower transmitting a television broadcast of one frequency band capable of receiving a service corresponding to one logical channel set by the channel setting unit 111 May be obtained.

  In this case, transmission is performed from a plurality of broadcast towers including a broadcast tower transmitting a television broadcast of one frequency band corresponding to one logical channel set based on an operation input from the user via the remote controller 2. Since all the logical channel identification information to be acquired is acquired, the updated logical channel identification information is acquired every time the logical channel identification information is updated on the broadcasting station side, so that the channel map is updated more efficiently. be able to.

  Specifically, the NIT relating to the other network (= a network including a plurality of transmission towers other than a broadcast tower to which a service corresponding to one logical channel set by the channel setting unit 111 is transmitted) NIT (other) information, which is information, is acquired, and the identification information acquisition unit 113 includes logical channel identification information (in this case, logical channel identification (=) in the Logical_channel_descriptor included in the NIT (other) information acquired by the table acquisition unit 113. (logic_channel_number) information) may be acquired.

  In this case, NIT (other) information, which is NIT information related to another network, is acquired, and Logical_channel_descriptor logical channel identification information (here, logical channel identification (= logical_channel_number)) included in the acquired NIT (other) information. Information) is acquired, the channel map can be updated more efficiently.

  That is, Logical_channel_descriptor logical channel identification information (= logical_channel_number) (ETSI EN 300 468 V1.6.1 (2004-06)) included in NIT (other) information defined in ETSI which is a European digital broadcasting standard, and Since IEC (International Electrotechnical Commission) 62216-1 (Draft Version 2.0.2) is acquired, it is possible to reliably acquire all logical channel identification information transmitted from a plurality of broadcast towers. In addition, the channel map can be updated more efficiently.

  FIGS. 3C and 3D are tables showing an example of logical channel number information acquired by the identification information acquisition unit 113 in this case. (C) is a chart showing an example of logical channel number information stored in the channel storage unit 121, and (d) is a chart showing an example of logical channel number information acquired by the identification information acquisition unit 113. In the charts shown in (c) and (d), in order from the left side, physical channel identification information (here, physical channel number information), service ID (Service id) that is identification information for identifying service contents, and logical Contains channel number information.

  In the chart shown in (c), the logical channel number corresponding to the service ID “102” having the physical channel number “21” is “2”, whereas in the chart shown in (d), the physical channel number is “2”. The logical channel number corresponding to the service ID “102” with the number “21” is changed to “8”. Also, in the chart shown in (c), the service IDs “203” and “204” with the physical channel number “23” and the corresponding logical channel numbers “13” and “14”, respectively. In the chart shown in (d), the physical channel numbers are changed to service IDs “203” and “204” with “23”, and the corresponding logical channel numbers are changed to “19” and “16”, respectively. .

  Furthermore, in the chart shown in (c), the logical channel number corresponding to the service ID “302” whose physical channel number is “25” is “22”, whereas in the chart shown in (d), The logical channel number corresponding to the service ID “302” having the physical channel number “25” is changed to “40”. Therefore, the identification information determination unit 114 determines that the logical channel number information acquired by the identification information acquisition unit 113 does not match the logical channel number information stored in the channel storage unit 121.

  3C and 3D, in the chart shown in FIG. 3C, the identification information update unit 115 performs logic corresponding to the service ID “102” whose physical channel number is “21”. The channel number is updated from “2” to “8”, and the logical channel numbers corresponding to the service IDs “203” and “204” with the physical channel number “23” are “13” and “14” to “19”, respectively. And the logical channel number corresponding to the service ID “302” having the physical channel number “25” is updated from “22” to “40”.

These are block diagrams which show an example of a structure of the digital broadcast receiver which concerns on this invention. These are block diagrams which show an example of a structure of the principal part in the digital broadcast receiver which concerns on this invention. These are tables showing an example of logical channel number information acquired by the identification information acquisition unit. These are screen figures which show an example of the channel update screen displayed on a display by a display control part. These are the flowcharts which show an example of operation | movement of a digital broadcast receiver (mainly MPU).

Explanation of symbols

1 Digital broadcast receiver (digital broadcast receiver)
11 MPU
111 Channel setting section (part of channel setting means)
112 Table acquisition unit (table acquisition means)
113 Identification information acquisition unit (identification information acquisition means)
114 Identification information determination unit (identification information determination means)
115 Identification information update unit (identification information update means)
116 Display control unit (display control means)
12 RAM
121 Channel storage unit (channel storage means)
14 Receiver (Receiving means)
17 Image output unit 173 Display (monitor)
2 Remote control (part of channel setting means)

Claims (6)

A digital broadcast receiver connected to receive a digital television broadcast and display the received video information on a monitor,
Receiving means for receiving a television broadcast of a preset frequency band;
Logical channel identification information, which is information for identifying a logical channel corresponding to one service displayed on the monitor, is information for identifying a physical channel corresponding to one frequency band that can be received by the service corresponding to the logical channel. Channel storage means for storing in advance in association with certain physical channel identification information;
A service that accepts an external operation input, sets one logical channel to be displayed on the monitor based on the accepted operation input, and provides a service corresponding to the set one logical channel to the receiving unit Channel setting means for receiving one receivable frequency band;
Table acquisition means for acquiring network information table (NIT) information included in the television broadcast of the one frequency band through the receiving means at predetermined time intervals set in advance;
Identification information acquisition means for acquiring logical channel identification information based on NIT information acquired by the table acquisition means;
Identification information determination means for determining whether or not the logical channel identification information acquired by the identification information acquisition means matches the logical channel identification information stored in the channel storage means;
When the identification information determining means determines that they do not match, the channel storage means replaces the logical channel identification information acquired by the identification information acquisition means with the logical channel identification information stored in the channel storage means. Identification information updating means for recording in
A digital broadcast receiving apparatus comprising:   The digital broadcast receiving apparatus according to claim 1, wherein the identification information acquisition unit acquires logical channel identification information corresponding to a logical channel received via the one frequency band. The table acquisition means acquires NIT (actual) information, which is NIT information related to the selected network,
3. The digital broadcast receiving apparatus according to claim 2, wherein the identification information acquisition unit acquires Logical channel identification information of Logical_channel_descriptor included in NIT (actual) information acquired by the table acquisition unit.   The said identification information acquisition means acquires all the logical channel identification information sent from the some broadcast tower including the broadcast tower which is transmitting the television broadcast of the said 1 frequency band, The Claim 1 characterized by the above-mentioned. The digital broadcast receiver as described. The table acquisition means acquires NIT (other) information which is NIT information related to another network,
5. The digital broadcast receiving apparatus according to claim 4, wherein the identification information obtaining unit obtains Logical_channel_descriptor logical channel identification information included in NIT (other) information obtained by the table obtaining unit.   And a display control unit configured to display information indicating that the logical channel identification information is updated when the identification information determination unit determines that they do not match. The digital broadcast receiver according to any one of claims 1 to 5.

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