JP4082987B2 - Digital broadcast receiver - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a digital broadcast receiving apparatus that receives a digital broadcast.
[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 satellite antenna or a terrestrial antenna with a digital tuner, and selects the selected broadcast wave. An arbitrary channel is selected from among a plurality of channels included in the image by demultiplexing processing, a digital signal of the selected channel is taken out and decoded to output a video / audio signal.
[0003]
By the way, in such digital broadcasting, a key (one touch key, preset key, etc.) is assigned to each broadcaster, and a desired broadcaster's channel can be directly selected by operating the assigned key. Is considered. As a related art related to this, there is one that selects one channel from among a plurality of channels of one broadcaster assigned corresponding to a predetermined button (see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-149451
[Problems to be solved by the invention]
However, in digital broadcasting, the same broadcaster (same broadcasting station), network, etc. can perform multiple channel broadcasting in various forms as a group, for example, standard definition broadcasting, high-definition broadcasting, radio broadcasting Data broadcasting can be performed. Therefore, if one-touch keys are assigned to individual channels, the number of keys becomes enormous and the remote control transmitter is enlarged. In addition, even if one channel can be selected from among a plurality of broadcaster's channels with a preset key as in the technique of the above-mentioned conventional publication, the user can watch other channels among the plurality of channels. If you want to see it, you will need to change the channel by operating the channel up / down key. In this case, you will have to move your fingertip from the preset key to the channel up / down key. bad. The channel selection by the channel up / down key is a channel selection process that does not consider the number of channels assigned to each preset key.
[0006]
In view of the above circumstances, an object of the present invention is to provide a digital broadcast receiving apparatus in which channel selection operability is improved in consideration of the number of channels of assigned keys.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the digital broadcast receiving apparatus of the present invention includes means for associating a grouped channel group with an allocation key, means for storing channel selection related information of the channel group, and the allocation key includes: Means for performing channel selection processing for one channel in the corresponding channel group when operated, and two or more channel selection operation processing for selecting a target channel after the assignment key is operated A tuning operation process is automatically selected in accordance with whether the number of channels of each assigned key exceeds a predetermined number.
[0008]
With the above configuration, the channel selection operation process is automatically selected according to the number of channels of each assigned key. Therefore, the channel selection operation process suitable for the case where the number of channels is small when the number of channels is equal to or less than the predetermined number. When the number of channels is automatically selected and the number exceeds a predetermined number, it becomes possible to automatically select a channel selection operation process that is advantageous when the number of channels is relatively low, and the channel selection operability is improved.
[0009]
The channel selection operation process corresponds to a first process in which another channel is sequentially selected from the corresponding channel group every time the allocation key is operated, and when the allocation key is operated. And a second process for selecting a channel selected by a user operation by displaying a list of channel groups on the screen. When the number of channels is less than or equal to a predetermined number, the first process is automatically selected and exceeds the predetermined number Sometimes the second process may be automatically selected.
[0010]
The predetermined number may be stored in advance in a memory as data. In this case, data is prepared for each age as the predetermined number, and the predetermined number is selected based on age information input by a user. It may be. The predetermined number may be set based on a result of a simulated channel selection operation performed by a user.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a digital broadcast receiver 30 of this embodiment for receiving terrestrial digital broadcast, FIG. 2 is a plan view of a remote control transmitter, and FIG. 3 is an explanation showing an example of a list display screen. 4 is an explanatory diagram illustrating screen transition during channel selection processing, FIG. 5 is an explanatory diagram illustrating a channel selection operation required time measurement screen by one-touch key operation, and FIG. 6 is based on a display list. FIG. 7 is an explanatory diagram illustrating a tuning operation required time measurement screen, and FIG. 7 is an explanatory diagram illustrating a tuning operation required time measurement result.
[0012]
In FIG. 1, a terrestrial antenna 1 is arranged outdoors in a predetermined direction, and receives a terrestrial digital broadcast signal. The terrestrial antenna 1 gives the received signal to the terrestrial digital tuner 2.
[0013]
The terrestrial digital tuner 2 extracts a signal having a specific frequency from the high-frequency digital modulation signal including video / audio data. The terrestrial digital tuner 2 includes a demodulation circuit, a deinterleave circuit, an error correction circuit, etc., and demodulates the selected digital modulation signal to output a transport stream.
[0014]
The demultiplexer (DEMUX) 3 separates the transport stream into MPEG2 (Moving Picture Experts Group 2) video stream, audio stream, PSI / SI (Program Specific Information / Service Information), and the like. The demultiplexer 3 supplies the video stream and the audio stream to the AV decoder 4 and supplies program information included in the PSI / SI to the CPU 13. Note that a plurality of channels are multiplexed in the transport stream, and the process for selecting an arbitrary channel from among these is the packet ID of the arbitrary channel in the transport stream from the PSI / SI. It becomes possible by taking out data such as whether or not it is multiplexed. The transport stream can also be selected based on PSI / SI information.
[0015]
The AV decoder 4 includes a video decoder that decodes a video stream and an audio decoder that decodes an audio stream. The video decoder decodes the input variable length code to obtain a quantization coefficient and a motion vector, and performs inverse DCT conversion, motion compensation control based on the motion vector, and the like. The audio decoder decodes the input encoded signal to generate audio data. The video data generated by the decoding is output to the video processing circuit 5, and the audio data is output to the audio processing circuit 6.
[0016]
The video processing circuit 5 receives video data from the AV decoder 4 and performs D / A conversion, for example, to convert it into a composite video signal. The audio processing circuit 6 receives the audio data output from the AV decoder 4 and performs D / A conversion to generate, for example, a right (R) sound analog signal and a left (L) sound analog signal.
[0017]
The video output circuit 7 and the audio output circuit 8 include an output resistor, an amplifier, and the like. The AV output terminal 9 is provided with an output unit (a set of left and right audio output terminals and video output terminals, etc.). This output unit is provided with a video / audio code 17 and is provided with a picture tube 16a and a speaker 16b. 16 is connected.
[0018]
The OSD (On Screen Display) circuit 12 outputs video data based on character information and color information instructed to be output from the CPU 13 to the adder 20. The adder 20 performs processing for incorporating the video data into the received video data output from the AV decoder 4. The OSD circuit 12 can display a menu screen and various setting screens.
[0019]
As shown in FIG. 2, the remote control transmitter 10 is provided with various keys and sends various commands to the broadcast receiving apparatus 30. When the key is operated, the remote control transmitter 10 means a command corresponding to the key. Signal light (remote control signal) is transmitted from the light emitting unit. The remote control light receiver 11 receives the signal light, converts it into an electric signal, and gives it to the CPU 13. In this embodiment, a key provided with numbers “1” to “12” provided in the remote control transmitter 10 is referred to as an assigned key (hereinafter referred to as a one-touch key). In this case, it is assumed that one broadcaster broadcasts using one transport stream, and one broadcaster is associated with one one-touch key.
[0020]
In the memory (for example, RAM, EEPROM, flash memory, etc.) 14, in addition to information for displaying the EPG screen, channel information (frequency information, information such as a channel list corresponding to the remote control key ID and a broadcasting station name) Various setting information is stored.
[0021]
The CPU 13 performs overall control in the digital broadcast receiving device 30. In particular, as processing according to the present invention, channel search processing, remote control key ID acquisition processing, one-touch key assignment processing, channel selection for one-touch key operation Perform processing.
[0022]
(Channel search process)
For example, the channel search is automatically executed when the power is turned on for the first time. In other words, the CPU 13 selects the lowest frequency in the UHF band at which the terrestrial digital broadcast is transmitted to the tuner 2 and performs the station determination. If it is determined that it is a station, the frequency information, station information (broadcast station series name, etc.) and channel list data are extracted and stored in the memory 14. This process is continued up to the highest frequency by sequentially increasing the frequency (for example, from 12 ch to 61 ch).
[0023]
(Remote control key ID acquisition process)
In the channel search described above, the PSI is separated from the transport stream at the stationary frequency, and the remote control key ID (TS number descriptor) of the network information table (NIT) is obtained, and the frequency information and the like described above are obtained. The data are stored in the memory 14 in association with each other.
[0024]
(One-touch key assignment process)
The frequency information for receiving the broadcast station is associated with the one-touch key having the number indicated by the acquired remote control key ID. In other words, when the broadcasting station adds “8” as a remote control key ID to the TS number descriptor and transmits it, the receiving device receives this information and acquires the remote control key ID. Set the broadcasting station to the one-touch key “8”. Thereafter, when the key “8” of the remote control transmitter 10 is pressed by the user, the channel of the XX broadcasting station is selected.
[0025]
(First channel selection processing by one-touch key operation)
As described above, when the one-touch key “8” of the remote control transmitter 10 is pressed by the user, a process of selecting a channel of the XX broadcasting station is performed. In digital broadcasting, a plurality of channels are prepared in each broadcasting station. Therefore, a process of selecting one channel from the channel list is performed. Here, it is considered that each broadcasting station tends to decrease (younger) the number of the representative channel in the provided channel group, so the channel to be selected first is included in the channel group. The channel with the smallest number is set.
[0026]
(Next operation to change channel)
{Circle around (1)} When the one-touch key “8” is successively pressed by the channel selection user successively by the one-touch key continuous operation, the channel having the next smallest number is selected in the channel list. Similarly, each time the same one-touch key is pressed, the channel with the next smallest number is selected, and when the key is pressed several times, the channel returns to the first channel.
[0027]
(2) When the channel of the smallest number is selected by sequentially pressing the channel selection one-touch key “8” by the direction key operation on the display list, and then the one-touch key “8” is pressed As shown in FIG. 3, a list showing the contents of the channel group is displayed on the screen by the OSD display function. The receiving device 30 detects whether or not the key of the remote control transmitter 10 is operated. When a direction key signal is detected, the cursor position on the display list is changed. When the operation of the enter key of the remote control transmitter 10 is detected, a process is performed for selecting the channel where the cursor is located at that time.
[0028]
As described above, in this embodiment, the channel is changed and selected sequentially by one-touch key continuous operation (hereinafter referred to as one-touch key continuous operation channel selection), and the cursor is moved on the channel list displayed on the screen. And a method for changing and selecting a channel (hereinafter referred to as cursor movement selection on the display list).
[0029]
(Channel selection operation time measurement process)
FIG. 4 shows screen transitions until channel 743 in the channel group assigned to the one-touch key “8” is selected using the above-described one-touch key continuous operation channel selection and cursor movement selection on the display list. It is a thing. FIG. 4A illustrates one-touch key continuous operation channel selection, and the one-touch key “8” is pressed a total of five times from the state in which the first ch 141 is displayed in the channel list until the channel 743 is received. . On the other hand, FIG. 4B illustrates the cursor movement tuning on the display list. Similarly, from the state where ch 141 is displayed, the one-touch key is pressed once, the down key is pressed five times, and the enter key is pressed once. Therefore, ch 743 is received by a total of seven key operations.
[0030]
Comparing these two channel selection processes, the number of key operations is smaller in the one-touch key continuous operation channel selection. However, if the cursor moves on the display list, the target channel (this channel can be viewed at a glance when the list is displayed). In the example, ch 743) can be confirmed. For this reason, when the number of channels assigned to the one-touch key is equal to or greater than the predetermined number, it is generally considered that the channel movement channel selection on the display list is superior in channel selection operability, and the number of one-touch key assigned channels is the predetermined number. When the number is smaller, the one-touch key continuous operation channel selection is considered to be superior in channel selection operability. Therefore, in one embodiment of the present invention, based on whether the number of one-touch key assigned channels is equal to or greater than a predetermined number, either the cursor movement channel selection on the display list or the one-touch key continuous operation channel selection is automatically selected. It is composed. Note that the predetermined number can be obtained experimentally, and if the experiment is performed by classifying the user's age, the predetermined number may be different depending on the age. When a predetermined number of data is stored in the memory 14 by age, the predetermined number can be selected by allowing the user to input the age.
[0031]
In the above example, the predetermined number is fixedly set, but it is desirable that the predetermined number actually set for each user is set. Hereinafter, an example of such processing will be described.
[0032]
For example, the user selects an item “measurement time required for channel selection operation” from the menu screen and measures the time required for the channel selection operation by performing an operation in accordance with the screen instruction. The CPU 13 selects the one-touch key having the largest number of assigned channels as the one-touch key to be measured for the required time. Then, for the cursor movement tuning on the display list and the one-touch key continuous operation tuning, the user's tuning operation required time is measured for each channel movement amount. Here, when the one-touch key “8” to which six channels of ch 141, ch 142, ch 441, ch 741, ch 742, and ch 743 are assigned is selected, for example, the amount of channel movement from ch 141 to ch 441 is 2, and from ch 141 to ch 741 The channel movement amount of is 3.
[0033]
(Measurement of time required for one-touch key continuous operation tuning)
FIG. 5 shows an example of a screen for measuring the required time in the one-touch key continuous operation channel selection. Here, the user is instructed to select ch 441 as the first measurement content. As shown in the screen transition diagram of FIG. 4A, the user can select the channel 441 by pressing the one-touch key “8” twice. The CPU 13 measures the time required to select the channel 441 and stores, for example, “3 seconds” as a measurement result in the memory 14 as the operation time of the movement amount 2 in the one-touch key continuous operation channel selection. By the same process, the time required for tuning from the moving amount 3 to the moving amount 5 is sequentially measured.
[0034]
(Measurement time required for cursor selection on display list)
FIG. 6 exemplifies a measurement screen of the movement amount 2 for the cursor movement channel selection on the display list, and the user is instructed to select the channel 441. As shown in the screen transition diagram of FIG. 4B, the user selects channel 441 by pressing the one-touch key “8” once to display a list, and further pressing the down key twice and the enter key. To do. The CPU 13 measures the time required to select the channel 441 and stores, for example, “3.5 seconds” as the measurement result in the memory 14 as the operation time of the movement amount 2 in the cursor movement channel selection on the display list. By the same process, the time required for tuning from the moving amount 3 to the moving amount 5 is sequentially measured.
[0035]
(Channel selection process switching channel number determination process)
FIG. 7 is an explanatory diagram illustrating the result of the channel selection processing time measurement process. According to this, when the movement amount of the channel is 2, the operation time by the one-touch key continuous operation channel selection is shorter, and when the movement amount is 3 or more, the operation time by the cursor movement channel selection on the display list is shorter. Is short. That is, the movement amount 3 becomes the threshold of the user, and if the channel movement amount is less than 3, the one-touch key continuous operation channel selection is used. If the channel movement amount is 3 or more, the cursor movement channel selection on the display list is used. The time required can be shortened.
[0036]
However, when the user first presses the one-touch key, it is impossible to determine which channel the user desires to select in the channel group assigned to the one-touch key. You cannot know in advance. Therefore, by selecting “the number of channels assigned to the one-touch key / 2” as the average movement amount of the one-touch key, “the threshold of the movement amount obtained by measurement (3 in the above example) × 2” is selected. The number of processing switching channels is good. If the channel selection process switching channel number is “6”, the one-touch key continuous operation channel selection is automatically performed when the one-touch key “2” having five channels is pressed in the subsequent channel selection operation by the user. When the one-touch key “8” having six channels is pressed, the cursor movement channel selection on the display list is automatically adopted. Thereby, according to the number of channels assigned to the one-touch key, it is possible to provide a tuning process suitable for each user.
[0037]
In the above example, all channel searches from 12ch to 61ch are performed. However, a table in which a region code and a channel list that can be received at that location are associated with each other is stored in a memory, and the user can Information may be received by receiving only the channels in the list by inputting the region code. In addition, the one-touch keys are associated with each other based on the acquired remote-control key ID, but the channel group (group) of each broadcaster is associated with the one-touch key of the user's favorite number without using the remote-control key ID. It is good. In addition, the case where the channel selected first in the operation of the one-touch key is the lowest numbered channel in the channel group is illustrated, but the present invention is not limited to this, and the channel that selects the so-called last channel first You may make it. In the above example, it is assumed that one broadcaster is broadcasting with one transport stream, and one broadcast operator is associated with one one-touch key. When a broadcaster (broadcasting station) broadcasts using a plurality of transport streams, or conversely, when a plurality of broadcasters (broadcasting stations) exist in one transport stream However, it is not necessarily limited to selecting a broadcaster with a one-touch key, and a group of channels in one or more transport streams may be made into one group. In other words, what group unit the one-touch key is set to may be arbitrarily determined according to the form in which the broadcast is performed. Further, in the above embodiment, the cursor movement tuning on the display list and the one-touch key continuous operation tuning are prepared and either one is automatically selected. However, other tunings may be prepared. It ’s good.
[0038]
【The invention's effect】
As described above, in the present invention, a plurality of channel selection operation methods are prepared, and an optimum channel selection operation method is automatically selected according to the number of channels of each assigned key, and the channel selection operation method is selected. The user can perform the channel selection operation.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a digital broadcast receiving apparatus according to an embodiment of the present invention.
FIG. 2 is a plan view showing a remote control transmitter.
FIG. 3 is an explanatory diagram showing a state in which a channel list is displayed.
FIG. 4 is an explanatory diagram illustrating screen transitions during channel selection processing.
FIG. 5 is an explanatory diagram illustrating a required time measurement screen by a one-touch key operation.
FIG. 6 is an explanatory diagram illustrating a required time measurement screen based on a display list.
[Fig. 7] Fig. 7 is an explanatory diagram showing a result of measuring the time required for channel selection operation.
[Explanation of symbols]
1 Antenna 2 Tuner 3 Demultiplexer (DEMUX)
4 AV decoder 12 OSD circuit 13 CPU
14 memory

Claims (4)

Means for associating a grouped channel group with an assignment key; means for storing channel-selection related information for the channel group; and channel selection for one of the corresponding channel groups when the assignment key is operated. Channel selection processing means for performing processing, and the channel selection processing means operates the allocation key as channel selection operation processing for selecting a target channel after the allocation key is operated. The first process of selecting another channel sequentially from the corresponding channel group and the list of the corresponding channel group when the assigned key is operated are displayed on the screen and selected by the user operation. And a second process for selecting the selected channel, the first process is automatically selected when the number of channels is less than or equal to the predetermined number, and when the number of channels exceeds the predetermined number Digital broadcasting receiver, characterized by automatically selecting a second process. 2. The digital broadcast receiving apparatus according to claim 1, wherein the predetermined number is stored in advance in a memory as data . 3. The digital broadcast receiving apparatus according to claim 2, wherein data is prepared for each age as the predetermined number, and the predetermined number is selected based on age information input by a user. apparatus. 2. The digital broadcast receiving apparatus according to claim 1, wherein the predetermined number is set based on a result of a simulation channel selection operation performed by a user .

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