JP3070497U - Digital broadcast receiver - Google Patents

Abstract

(57) [Abstract] [Problem] To improve usability when operating an up key or a down key. When an up key is operated, a reception control unit performs a physical operation indicated by data corresponding to a station channel number which is the smallest in a range larger than the station channel number received at that time. When the down key 22 is operated, the physical channel indicated by the data corresponding to the maximum station channel number within a range smaller than the number of the station channel received at that time is controlled. Controls reception.

Description

[Detailed description of the invention] [Technical field to which the invention belongs]

The present invention relates to a receiving apparatus for receiving digital broadcasting, and more particularly, to a digital broadcasting receiving apparatus for changing a receiving channel in accordance with the order of station channel numbers when an up-down key is operated. Things.

[0002]

[Prior art]

 In recent years, even in a digital broadcast receiving apparatus that has been put into practical use in the television industry, a receivable channel is detected and stored by using an auto search. Now, assuming that a channel determined by a frequency is a physical channel and a channel determined by a broadcast station is a station channel, each radio wave contains data indicating a station channel number. Therefore, when the auto search is completed, data indicating the correspondence between the physical channel that can receive the broadcast and the station channel number corresponding to the physical channel is obtained. This data is stored in a predetermined area.

Now, it is assumed that data obtained by the auto search is the data shown in FIG. It is also assumed that the physical channel 20 is being received. In this state, when the up key of the channel is operated, the physical channel 39 which can receive broadcast next is searched in the direction of increasing the channel number of the physical channel. Then, the searched physical channel 39 is received, and the channel number “6” of the station channel is displayed (referred to as a first related art).

Further, as a conventional technique relating to channel selection when the station channel number does not match the physical channel number, there is a technique disclosed in Japanese Patent Application Laid-Open No. H4-284077. That is, in this technique, a memory circuit for storing channel selection data stores, for each of all broadcast channels, station data having a value of 1 when radio waves are received and a value of 0 when radio waves are not received. An area for storing is provided. Further, an area for storing a flag indicating whether or not there is a change in the displayed channel number and frequency fine adjustment data, and an area for storing the changed channel number and the changed fine adjustment data are provided. .

For example, when the up key of a channel is operated, a search is made for a physical channel in which the local data becomes 1 in the direction in which the physical channel number increases. When the flag corresponding to the searched physical channel indicates that there is no change, the searched physical channel is received without fine adjustment. Also, the channel number of the received physical channel is displayed. On the other hand, when the flag indicates that a change has been made, the reception frequency is finely adjusted based on the fine adjustment data, and the changed channel number is displayed (this is referred to as a second conventional technique).

[0006]

[Problems to be solved by the invention]

 However, when the first and second prior arts are used, the following problems occur. This will be described with reference to FIG. Now, FIG. 4 shows data obtained by the auto search of the first prior art, or between the physical channel and the station channel when the channel number of the station channel is changed in the second prior art. It is assumed that the correspondence is shown. It is also assumed that 15 physical channels are being received. When the up key is operated in this state, the received physical channel changes to 20, 39, 44, and 69 each time the up key is operated. Then, in response to the change of the physical channel, the station channel number displayed on the CRT or the like changes to 20, 6, 44, or 1. That is, when the up key or the down key is operated, the channel number of the displayed station channel appears to the user to change randomly. Therefore, it is not clear whether operating the up key requires fewer operations or receiving the down key requires fewer operations to receive the desired station channel. . For this reason, usability of the up key and the down key has been poor.

The present invention has been made to solve the above-mentioned problem. The purpose of the present invention is to operate a physical channel to be received in accordance with the order of channel numbers of station channels when operating an up key or a down key. It is an object of the present invention to provide a digital broadcast receiving apparatus which can improve usability when operating an up key or a down key by changing.

[0008] In addition to the above-mentioned object, a physical channel to be received is determined based on data indicating a correspondence between a physical channel and a station channel obtained by an auto search, thereby improving usability. An object of the present invention is to provide a digital broadcast receiving apparatus that can simplify an initial setting operation.

In addition to the above objects, data obtained by rearranging the channel numbers of the station channels in the order of the number is stored in a memory, and the operation corresponding to the operation is performed by referring to the data in the memory. It is an object of the present invention to provide a digital broadcast receiving apparatus capable of simplifying control for determining a station channel corresponding to operation of an up key or a down key by obtaining a station channel.

[0010]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the digital broadcast receiving apparatus according to the present invention uses a received physical channel when a channel determined by the frequency of the digital broadcast signal is a physical channel and a channel determined by the broadcast station of the digital broadcast signal is a station channel. , A channel storage unit for storing a correspondence relationship between data indicating a received physical channel and a station channel number in the received physical channel, an input unit having an up key and a down key operated when the channel to be received is changed, and the input unit Is operated by referring to the channel storage unit to apply to a digital broadcast receiving apparatus having a reception control unit that changes the physical channel to be received, and the reception control unit operates the up key Sometimes, the number of the station channel that is higher than the It performs control to receive the physical channel indicated by the data corresponding to the station channel number that is the smallest in the box, and when the down key is operated, the number within the range of the station channel number that was received at that time is smaller. It is configured to control to receive the physical channel indicated by the data corresponding to the maximum station channel number.

[0011] That is, when the up key is operated, the reception control unit changes the broadcast station to be received from a smaller station channel number to a larger station channel regardless of the order of the physical channels. Also, when the down key is operated, the receiving station is changed from the larger station channel number to the smaller station channel, regardless of the physical channel order.

[0012] In addition to the above configuration, the channel storage unit stores the correspondence between the data of the physical channel obtained in the auto search and the number of the station channel.

That is, the initial setting is completed only by performing the auto search.

Further, in addition to the above configuration, the information processing apparatus further includes a number sequence data storage unit for storing number sequence data obtained by rearranging the station channel numbers stored in the channel storage unit in ascending order of the numbers. The reception control unit is configured to, when the input unit is operated, obtain a station channel number corresponding to the operation of the input unit by referring to the data storage unit in numerical order.

That is, as for the station channel number corresponding to the operation of the up key or the down key, it is only necessary to take out the number stored adjacent to the station channel number received at that time.

[0016]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the digital broadcast receiving apparatus according to the present invention.

In FIG. 1, a tuner 1 is a block that receives a digital broadcast broadcast in a VHF band and a UHF band and converts the frequency into an intermediate frequency signal. Then, the intermediate frequency signal obtained by the frequency conversion is output to the IF circuit 2. For this purpose, a high-frequency amplifier circuit, a mixing circuit, a PLL oscillation circuit, and the like are provided.

The IF circuit 2 is a block that amplifies the intermediate frequency signal output from the tuner 1, and outputs the amplified intermediate frequency signal to the A / D converter 3. The A / D converter 3 is a block for converting an intermediate frequency signal into a digital signal, and outputs the intermediate frequency signal converted into a digital signal to the data processing circuit 4.

The data processing circuit 4 is a block that extracts, from the output of the A / D converter 3, data indicating a channel (station channel number or the like) of a received broadcast station, a digital video signal, or the like. . Then, data (station channel number, etc.) indicating the extracted station channel is output to the channel storage unit 8 and stored. Further, the extracted digital video signal is output to the NTSC encoder 5.

For this reason, the data processing circuit 4 includes a decoder for expanding VSB-compressed data, a demultiplexer for distributing packets in the decompressed data according to the type of data, and a demultiplexer for distributing the packets. Among them, an MPEG decoder for expanding data representing an image into a digital video signal is provided.

The NTSC encoder 5 is a block that converts the digital video signal expanded by the data processing circuit 4 into an NTSC analog video signal. Then, the converted analog video signal is output to the display unit 6. The display unit 6 is a block for displaying an analog video signal on a display such as a CRT.

The channel storage unit 8 is a block for storing a correspondence between a station channel and a physical channel found by an auto search. That is, when the broadcast is received on the received physical channel in the auto search, the correspondence between the data (channel number) indicating the received physical channel and the channel number of the station channel in the received physical channel is stored. .

At the end of the auto search, the number-sequential data storage unit 9 rearranges all of the channel numbers of the station channels stored in the channel storage unit 8 in order from the larger number to the smaller number. This is a block that stores the number-ordered data obtained.

The input unit 13 has an up key, a down key, and the like, and is a block operated when a channel is changed. For this purpose, an input circuit 11 and a remote controller 12 are provided.

Specifically, the input circuit 11 includes a plurality of key switches such as an up key, a down key, and a power key provided on the operation panel, and a light receiving unit that receives infrared rays transmitted from the remote controller 12. It is a block equipped. The remote controller 12 is a block including an up key 21, a down key 22, and other keys.

The reception control unit 7 is a block configured with a CPU as a main unit, and controls main operations as a reception device. For this reason, when an operation for changing the channel is input to the input unit 13, the broadcast of the station channel corresponding to the operation of the input unit 13 is received by referring to the data stored in the channel storage unit 8. Control is performed.

That is, when the up key 21 is operated, the reception control unit 7 stores the number of the station channel which is the smallest in the range of numbers larger than the number of the station channel being received at that time, in the number-sequential data storage unit. Read from step 9. That is, among the station channel numbers stored in the number-sequential data storage unit 9, the number of the station channel adjacent to the station channel that is higher than the number of the currently receiving station channel is read. Then, by referring to the channel storage unit 8, the control for receiving the physical channel corresponding to the read station channel number is performed.

When the down key is operated, the number of the station channel having the maximum number within a range smaller than the number of the station channel received at that time is read from the number-sequential data storage section 9. That is, of the station channel numbers stored in the number-sequential data storage unit 9, the number of the station channel adjacent to the station channel number that is smaller than the number of the currently receiving station channel is read. Then, by referring to the channel storage unit 8, control is performed to receive a physical channel corresponding to the read station channel number.

FIG. 2 is a flowchart showing a main operation at the time of initial setting of the embodiment. FIG. 3 is a flowchart showing a main operation when the up key 21 or the down key 22 is operated. FIG. 4 is an explanatory diagram showing an example of data stored in the channel storage unit 8, and FIG. 5 is an explanatory diagram showing an example of data stored in the number-ordered data storage unit 9. The operation of the embodiment will be described with reference to these drawings as necessary.

When checking a physical channel that can receive a broadcast, the reception control unit 7 performs control for an automatic search. That is, the reception control unit 7 sequentially changes the physical channels received by the tuner 1 from channel numbers 1 to 69. Then, when a broadcast is received on the received physical channel, the station channel number extracted by the data processing circuit 4 is stored in the channel storage unit 8 (step S1).

When the above-described auto search is completed, it is assumed that data as shown in FIG. That is, it is assumed that a broadcast whose station channel is No. 3 in the 15th physical channel is received. Also, the broadcast with the station channel No. 20 in the physical channel 20, the broadcast with the station channel No. 6 in the physical channel 39, the broadcast with the station channel No. 44 in the physical channel 44, and the broadcast with the station channel No. 44 in the physical channel 69 Suppose that the broadcast with the first channel is received.

When the above data is obtained in the channel storage unit 8, the reception control unit 7 stores all of the station channel numbers (3, 20, 6, 44, 1) stored in the channel storage unit 8. read out. Then, the read station channel numbers are rearranged in numerical order. Then, the rearranged numbers (numbered data) are stored in the numbered data storage unit 9. For this reason, the number-ordered data storage unit 9 stores the number-ordered data shown in FIG. 5 (step S2).

With the above, the operation for the initial setting is completed. When, for example, the number key “1” (not shown) of the remote controller 12 is operated in a state where the initial setting is completed, the reception control unit 7 refers to the channel storage unit 8 and The tuner 1 receives the physical channel 69 corresponding to the number.

When the up key 21 is operated in this state, the reception control unit 7 changes the number “3” stored on the upper side of the number “1” stored in the number-sequential data storage unit 9 to the next number. Is determined to be the number of the station channel to be received (steps S5 and S6). Then, by referring to the channel storage section 8, the tuner 1 receives the 15th physical channel corresponding to the 3rd station channel. Further, the data processing circuit 4 is instructed to display the third station channel. As a result, the display unit 6 displays the image of the physical channel number 15 and the numerical value “3” indicating the station channel number 3 (step S7).

In the above state, when the up key 21 is operated, the reception control unit 7 sets the number “6” stored on the upper side of the number “3” stored in the numbered data storage unit 9 to the next number. Is determined to be the number of the station channel to be received (steps S5 and S6). Then, the tuner 1 receives the 39th physical channel corresponding to the 6th station channel by referring to the channel storage unit 8. Also, the data processing circuit 4 is instructed to display the sixth station channel. As a result, the display unit 6 displays the image of the 39th physical channel and the numerical value “6” indicating the 6th station channel (step S7).

When the up key 21 is operated, an image for receiving the physical channel No. 20 and a numerical value “20” indicating the station channel No. 20 are displayed on the display unit 6. Then, when the up key 21 is further operated, the image that has received the 44th physical channel and the numerical value “44” indicating the 44th station channel are displayed on the display unit 6. Then, when the up key 21 is further operated, an image having received the physical channel No. 69 and a numerical value “1” indicating the station channel No. 1 are displayed on the display unit 6.

That is, every time the up key 21 is operated, the received station channel number changes in the order of “1”, “3”, “6”, “20”, and “44”. Then, the process returns to the first station channel, and similarly changes thereafter.

The operation when the up key 21 is operated has been described above, and the operation when the down key 22 is operated will be described. Before the operation of the down key 22, it is assumed that the station channel number 44, that is, the physical channel number 44 has been received.

When the down key 22 is operated in the above state, the reception control unit 7 sets the number “20” stored at the lower side of the number “44” stored in the number-ordered data storage unit 9 to the next number. (Steps S5 and S8). Then, the tuner 1 receives the physical channel No. 20 corresponding to the station channel No. 20 by referring to the channel storage unit 8. Further, the data processing circuit 4 is instructed to display the station channel No. 20. As a result, the display unit 6 displays the video that received the physical channel number 20 and the numerical value “20” indicating the station channel number 20 (step S7).

In this state, when the down key 22 is operated, the reception control unit 7 sets the number “6” stored below the number “20” stored in the number-order data storage unit 9 to the next number “6”. Is determined to be the number of the station channel to be received (steps S5 and S8). Then, the tuner 1 receives the 39th physical channel corresponding to the 6th station channel by referring to the channel storage unit 8. In addition, the data processing circuit 4 is instructed to display the sixth station channel. As a result, the display unit 6 displays the video that has received the 39th physical channel and the numerical value “6” indicating the 6th station channel (step S7).

When the down key 22 is operated, an image having received the number 15 of the physical channel and a numerical value “3” indicating the number 3 of the station channel are displayed on the display unit 6. Then, when the down key 22 is further operated, an image having received the number 69 of the physical channel and a numerical value “1” indicating the number 1 of the station channel are displayed on the display unit 6. Then, when the down key 22 is further operated, an image having received the 44th physical channel and a numerical value “44” indicating the 44th station channel are displayed on the display unit 6.

That is, every time the down key 22 is operated, the station channel number to be received changes in the order of “44”, “20”, “6”, “3”, “1”. Then, the process returns to the station channel No. 44, and similarly changes thereafter.

The present invention is not limited to the above embodiment, and can be similarly applied to a device having an analog broadcast receiving function.

Further, as for the numerical data stored in the numerical data storage unit 9, the case where the data is rearranged from the larger number to the smaller number has been described, but the data is rearranged from the smaller number to the larger number. It is good also as a structure which rearranges.

[0045]

[Effect of the invention]

 As described above, in the digital broadcast receiving apparatus according to the present invention, when the up key is operated, the reception control section has the smallest number in a range of numbers larger than the number of the station channel currently being received. Performs control to receive the physical channel indicated by the data corresponding to the station channel number, and when the down key is operated, the largest station channel in the range of numbers smaller than the station channel number received at that time Is configured to perform control to receive the physical channel indicated by the data corresponding to the number. Therefore, when the up key is operated, the broadcast station to be received changes from the smaller station channel number to the larger station channel number. Also, when the down key is operated, the broadcast station to be received changes from a higher number to a lower number. This makes it easier to use the up and down keys.

Further, the channel storage unit is configured to store the correspondence between the physical channel data obtained in the auto search and the station channel numbers. Therefore, the initial setting is completed only by performing the automatic search, and thus the initial setting operation for improving the usability can be simplified.

Further, the reception control unit further comprises a number-ordered data storage unit for storing the number-ordered data obtained by rearranging the station channel numbers stored in the channel storage unit in ascending order of the numbers. Is configured such that, when the input unit is operated, the number of the station channel corresponding to the operation of the input unit is obtained by referring to the number-ordered data storage unit. Therefore, as for the station channel number corresponding to the operation of the up key and the down key, only the number stored adjacent to the station channel number received at that time need be taken out. This makes it possible to simplify the control for determining the station channel corresponding to the operation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of a digital broadcast receiving apparatus according to the present invention.

FIG. 2 is a flowchart illustrating a main operation of the embodiment at the time of initial setting.

FIG. 3 is a flowchart showing a main operation when an up key or a down key is operated.

FIG. 4 is an explanatory diagram illustrating an example of data stored in a channel storage unit.

FIG. 5 is an explanatory diagram illustrating an example of data stored in a number-ordered data storage unit.

[Explanation of symbols]

 7 Reception control unit 8 Channel storage unit 9 Number order data storage unit 13 Input unit 21 Up key 22 Down key

Claims (3)

[Utility model registration claims] When a channel determined by a frequency of a digital broadcast signal is defined as a physical channel and a channel determined by a broadcast station of the digital broadcast signal is defined as a station channel, data indicating a received physical channel, a station channel in the received physical channel, A channel storage unit that stores a correspondence relationship with the number of the input channel, an input unit that has an up key and a down key that are operated when the channel to be received is changed, and refers to the channel storage unit when the input unit is operated. Thus, in the digital broadcast receiving apparatus provided with a reception control unit that changes a physical channel to be received, when the up key is operated, the reception control unit has a number larger than the number of the station channel currently being received. Data corresponding to the station channel number that is the smallest in the range Performs control for receiving a physical channel indicated by,
When the down key is operated, control is performed to receive a physical channel indicated by data corresponding to a station channel number which is the largest in a range of numbers smaller than the station channel number being received at that time. Digital broadcast receiving device. 2. The digital broadcast receiving apparatus according to claim 1, wherein said channel storage unit stores a correspondence relationship between physical channel data and station channel numbers obtained in an auto search. 3. A number order data storage unit for storing number order data obtained by rearranging station channel numbers stored in a channel storage unit in ascending order of numbers, wherein the reception control unit comprises: When the input unit is operated,
3. The digital broadcast receiving apparatus according to claim 1, wherein a station channel number corresponding to an operation of the input unit is obtained by referring to a number-ordered data storage unit.