[0050] Hereinafter, the present invention will be introduced in combination with the best examples and drawings.
[0051]image 3 It is a block diagram of the digital program channel tuning device adopting the present invention. To image 3 For reference, the digital program channel tuning device and digital program receiving device of the present invention are described in detail as follows.
[0052] Such as image 3 As shown, the main constituent elements of the present invention are mainly listed, and the basic constituent elements displayed after receiving the digital program signal from the digital program receiving device are simply listed or omitted. However, even if the pictures and detailed descriptions of the above basic components are omitted, anyone in the industry can pass image 3 Understand the channel tuning equipment and control methods of digital programs.
[0053] The digital program transmitting place 301 composes the physical channel used by each TV station and the virtual channel information matching the physical channel into a transport stream, and then transmits it to the digital program receiving device 302.
[0054] Moreover, as the above-mentioned transport stream carries channel mapping information, such as Figure 4 Shown. However, the above-mentioned transport stream may be allocated and transmitted to a designated frequency band, or the above-mentioned physical channel and virtual channel related information and the ordinary program data stream may be multiplexed and transmitted at the above-mentioned digital program transmitting place 301.
[0055] Moreover, it should be said that there is no special restriction on the above-mentioned digital program transmitting place 301. It can be a designated rebroadcasting device that receives the broadcasted physical channel and virtual channel information from the TV station and transmits it to the digital program receiving device 302 in the form of a transport stream, or the original Some TV stations.
[0056] Furthermore, the above-mentioned digital program receiving device 302 is a device embodying the present invention, and includes constituent elements described below. Moreover, the above-mentioned digital program receiving device 302 is not particularly limited. For example, the above-mentioned program receiving device 302 may be any device that can receive digital programs, such as a TV, a monitor, a mobile phone, or DMB.
[0057] The tuner 303 can receive the transport stream containing the physical channel, virtual channel related information and the ordinary program stream from the digital program transmitting place 301 through an antenna (not shown in the figure).
[0058] At the same time, the input part 312 inputs the virtual channel number that the user wishes to watch. Furthermore, it should be said that there is no particular limitation on the aforementioned input unit 312, and it may be one or more of a remote control or a local key attached to the aforementioned digital program receiving device.
[0059] The control unit 311 first determines whether the virtual channel number input via the input unit 312 is stored in the channel map storage unit 313.
[0060] If the control unit 311 determines that the input virtual channel number is not stored in the channel map storage unit 313, the control unit 311 uses the physical channel and virtual channel related information in the transport stream received from the digital program transmitter 301 , Search whether there is a physical channel matching (mapping) with the input channel number.
[0061] Furthermore, if the physical channel is found as a result of the search by the control unit 311, the tuning unit 303 tunes to the transport stream signal of the frequency corresponding to the physical channel.
[0062] Of course, the control unit 311 analyzes the transport stream of the physical channel and the virtual channel, and if there are two or more minor channels included in the virtual number input via the upper input unit 312, the minor channel is output through the display unit 306 List.
[0063] However, the control unit 311 determines that the channel number is not stored in the channel mapping storage unit, and even if the physical channel and virtual channel information in the transport stream received from the digital program transmitter are used, it is impossible to search for a match with the channel number (mapping ), the input channel number itself is judged as a physical channel.
[0064] At this time, the tuning unit 303 tunes to the transport stream signal of the input frequency assigned to the channel number.
[0065] Figure 5 A flowchart (sequence diagram) of the digital program channel tuning method of the present invention. To Figure 5 For reference, the tuning method of digital program channels is introduced as follows.
[0066] Input the major number (Major number) through the input part, step S501.
[0067] It is judged whether the input main number is stored in the channel map, stage S502.
[0068] The above judgment result is that if the input main number is stored, a list of minor numbers (Minor numbers) included in the main number is displayed, step S503. Of course, if the above sub-number is one, it may not be displayed.
[0069] At this time, the designated channel number will be selected from the above-mentioned display list, stage S504.
[0070] Using the above-mentioned channel mapping as a standard, tune to the digital program signal corresponding to the physical channel frequency matching the above-mentioned designated channel number, stage S505.
[0071] However, the above judgment result is that the input main number is not stored in the channel map, and the transport stream signal loaded with the physical channel and virtual channel related information received from the digital program transmitting place is analyzed, stage S506.
[0072] It is judged whether there is information corresponding to the main number of the input virtual channel in the above-mentioned analyzed transport stream, stage S507.
[0073] If the determination result of S507 is that there is information corresponding to the main number of the input virtual channel in the transport stream, the physical channel corresponding to the main number of the virtual channel is searched, and the digital program signal corresponding to the frequency of the physical channel is tuned.
[0074] If the result of the determination in S507 is that there is no information corresponding to the main number of the input virtual channel in the transport stream, the main number of the input virtual channel is recognized as a physical channel number, and the digital program signal of the corresponding frequency is adjusted.
[0075] Based on the content described above, those skilled in the art can make various changes and modifications within the scope of the technical idea of the present invention. Therefore, the technical scope of the present invention is not limited to the content described in the embodiments, and must be determined by the claims.
