CN1201300A - Satellite broadcast receiving device - Google Patents
Satellite broadcast receiving device Download PDFInfo
- Publication number
- CN1201300A CN1201300A CN98102019A CN98102019A CN1201300A CN 1201300 A CN1201300 A CN 1201300A CN 98102019 A CN98102019 A CN 98102019A CN 98102019 A CN98102019 A CN 98102019A CN 1201300 A CN1201300 A CN 1201300A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- polarized wave
- mentioned
- transmission stream
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Details Of Television Systems (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention provides a satellite broadcast receiver capable of easily and automatically setting a converter frequency without the need of complicated setting in the case of use in a co-viewing reception system. In steps S1-S3, frequency search is performed from the lowest frequency side of a frequency range that an intermediate frequency signal can take and the ID number information of the channel, the ID number information of all the channels used in broadcasting and polarization information are obtained from TS (transport stream) signals received first. In the steps S4 and S5, the frequency search is performed from a highest frequency side and the ID number information of the channel is obtained from the TS signals received first. In the steps S6-S8, the polarization of the TS signals of lowest and highest frequencies is identified and whether or not they are mutually different is judged. When they are different, a reception system for co-viewing is defined in the step S9 and the converter frequency is automatically set in the step S10.
Description
The present invention relates to receive the satellite broadcast receiving device of digital satellite broadcasting.
Recently, utilize the digital television broadcasting (digital satellite broadcasting) of communication satellite (CS) to start broadcasting.In digital satellite broadcasting, except picture intelligence, voice signal, also send control data simultaneously, satellite broadcast receiving device utilizes its control data to come picture intelligence and voice signal are carried out demodulation.
The satellite broadcast receiving device that receives digital satellite broadcasting is identical with the satellite broadcast receiving device that receives analog satellite broadcasting, receive electric wave by parabolic antenna by the 12GHz frequency band of satellite transmission, be transformed to first IF-FRE of 1GHz frequency band by being located at frequency converter on the parabolic antenna, this first IF-FRE is transfused to satellite broadcast receiving device by antenna cable.
In CS broadcasting, use linear polarized wave, at adjacent channel each other,, improve the utilance of frequency by alternate configurations horizontal vertical polarized wave.
In such individual reception system of general family, send the control signal of switching the horizontal vertical plane of polarization from satellite broadcast receiving device to external device (ED) (transducer body or polarized wave switch etc.), only the signal of either party's plane of polarization input satellite broadcast receiving device.In the such community receiving system of mansion, the channel of the signal that is transformed to the 1GHz frequency band is reallocated, as the signal input satellite broadcast receiving device that does not have the difference of horizontal vertical polarized wave.
In the digital satellite broadcasting receiving system, utilize the MPEG2 system.In the digital broadcasting that utilizes the MPEG2 system, the Bit String that is carried out multiplexing transmission stream signal (hereinafter referred to as the TS signal) by image, sound, a plurality of programs that data flow constituted is modulated and transmitted, so that can alleviate losing of data in the transmission path.
In this TS signal, comprise the table information that is used to distinguish the pictures and sounds data that in signal, comprise.Suite table (hereinafter referred to as PAT), network information table 4 kinds of tables such as (hereinafter referred to as NIT) in table information, have been stipulated.
The information such as id number that in PAT, comprise the TS signal that is receiving at present.The information such as id number, transmission frequency, polarized wave that in NIT, comprise the whole TS signals that use transmitting station side.
In such digital satellite broadcasting receiving system, not only to be suitable for the individual reception system, but also want to be suitable for community receiving system.In order to be suitable for community receiving system, the user will be when being used for the initial setting of CS broadcast reception, on menu screen the local frequency of frequency converter (hereinafter referred to as frequency converter frequency) be set at can by community receiving system receive frequency.
Like this, in existing satellite broadcast receiving device, frequency converter frequency need be in community receiving system, set, and complicated setting need be carried out.
In view of the above problems, the purpose of this invention is to provide a kind of satellite broadcast receiving device, can under situation about using, not need to carry out complicated setting, automatic setting frequency converter frequency simply by community receiving system.
In order to solve above-mentioned the problems of the prior art, the invention provides a kind of satellite broadcast receiving device, can received by antenna (1) from the digital broadcasting electric wave of satellite by being located at the frequency converter (2a on the above-mentioned antenna, 2b) be transformed to intermediate-freuqncy signal, obtain picture intelligence and voice signal from this intermediate-freuqncy signal, it is characterized in that, comprise: first acquisition device, begin to carry out frequency search from a side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtain the id number information of its channel and the id number information of employed whole channels and polarized wave information (step S1～S3) broadcasting from the transmission stream signal of initial reception; Second acquisition device begins to carry out frequency search from the opposite side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtains the id number information (step S4, S5) of its channel from the transmission stream signal of initial reception; Recognition device is discerned minimum and polarized wave (step S6, S7) highest frequency transmission stream signal separately from the id number information and the polarized wave information of whole channels of being obtained by above-mentioned first acquisition device; Whether mutually judgment means judges the polarized wave different (step S8) of the transmission stream signal of the polarized wave of transmission stream signal of the low-limit frequency that is obtained by above-mentioned recognition device and highest frequency; Setting device is according to the local frequency (step S9, S10) of being come the above-mentioned frequency converter of automatic setting by the judged result that above-mentioned judgment means produced.
These and other purpose, advantage and feature of the present invention will be in conjunction with the drawings to the description of embodiments of the invention and further specified.In these accompanying drawings:
Fig. 1 is the block diagram of an embodiment of expression satellite broadcast receiving device of the present invention;
Fig. 2 is the flow chart that is used to illustrate the action of satellite broadcast receiving device of the present invention;
Fig. 3 is the figure of reallocation that is used for illustrating the channel of community receiving system.
Come with reference to the accompanying drawings satellite broadcast receiving device of the present invention is described.In Fig. 1, receive by parabolic antenna 1 from the 12GHz band electric waves of satellites transmits, be transformed to first IF-FRE of 1GHz frequency band by being located at frequency converter 2a, 2b on this parabolic antenna 1.Among frequency converter 2a, the 2b, one is the frequency converter that horizontal polarized wave is used, and another is the frequency converter that vertically polarized wave is used.Import shared frequency converter 4 from the intermediate-freuqncy signal that frequency converter 2a, 2b are exported by antenna cable 3.
Because shared frequency converter 4 is the frequency converters that are used for community receiving system, then as described above, the channel of the signal that is transformed to the 1GHz frequency band reallocated, and become the signal of the difference that does not have the horizontal vertical polarized wave.
That is, the signal that channel carried out reallocation of the signal transformation with vertical both channels of (V) polarized wave of the such level (H) shown in Fig. 3 (A) for the such difference that does not have the horizontal vertical polarized wave shown in Fig. 3 (B).In Fig. 3 (A), (B), 1～7 expression is carried out 1 multiplexing physical channel to a plurality of channels.The output of shared frequency converter 4 is transfused to satellite broadcast receiving device 16 by antenna cable 3.
In satellite broadcast receiving device 16, Network Interface Module circuit (hereinafter referred to as the NIM circuit) 5 carries out channel selection, digital demodulation, error correction by the channel selecting signal 14 from CPU 13, and playback transmission stream signal (TS signal) and output.Multiplexing a plurality of channels in the channel in the digital broadcasting of a channel that is equivalent to analog broadcasting are meant in this said channel selection and carry out channel selection to a plurality of channels being carried out a multiplexing physical channel (below call physical channel).
The TS signal of being exported from NIM circuit 5 is transfused to scramble circuit 6 and removes scramble, is input to then in the demultiplexing circuit 7.Demultiplexing circuit 7 is imported CPU 13 to table information by the control signal 15 from CPU 13.By from the control signal 15 of CPU 13 and only the signal input mpeg decode circuit 8 of wishing channel.At this, so-called channel of wishing is meant the specific channel in the physical channel.
8 pairs of signals of being imported of mpeg decode circuit carry out mpeg decode, and are input in picture intelligence handling part 9 and the voice signal handling part 10.9 pairs of picture intelligences of picture intelligence handling part are handled and from lead-out terminal 11 outputs, 10 pairs of voice signals of sound signal processing portion are handled and exported from lead-out terminal 12.
On the other hand, the output of CPU 13 is transfused to screen and goes up display control unit 17, and shows signal is imported in the display circuit 18 on the screen of going up display control unit 17 from shielding.The output of display circuit 18 is imported into the display part 19 of cathode ray tube etc. and becomes on the predetermined screen and shows.
Use Fig. 2 to come the action as the CPU 13 of feature of the present invention is described below.In Fig. 2, when beginning to be used for the initial setting of CS digital broadcasting reception, in step S1, in the frequency range that first intermediate-freuqncy signal obtains, begin to carry out frequency search from the low-limit frequency side.Specifically, search for first intermediate-freuqncy signal, judge that could carry out channel receives by for example having or not of TS signal from the NIM circuit with the frequency interval of the centre frequency that can be familiar with physical channel.
In step S2, obtain PAT from the TS signal of initial reception, obtain the id number information of the physical channel of present reception.In step S3, obtain NIT, obtain the id number information and the polarized wave information of whole physical channel of in broadcasting, using.
Then, in step S4, in the frequency range that first intermediate-freuqncy signal obtains, begin to carry out frequency search from the highest frequency side.In step S5, obtain PAT from the TS signal of initial reception, obtain the id number information of the physical channel of present reception.
Then, in step S6, use the id number information and the polarized wave information that in step S3, obtain, be identified in the polarized wave of the physical channel that receives among the step S2.Equally, in step S7, use the id number information and the polarized wave information that in step S3, obtain, be identified in the polarized wave of the physical channel that receives among the step S5.
Then, in step S8, judge whether polarized wave of discerning and the polarized wave of discerning be inequality in step S6 in step S7.
If polarized wave of discerning and the polarized wave of discerning are different, then move on to step S9, and to be defined as be community receiving system in step S7 in step S6.Then, in step S10, frequency converter frequency is automatically made can be by the frequency of community receiving system reception, end process.
On the other hand, if the polarized wave of discerning in step S6 is identical with the polarized wave of discerning in step S7, then is judged as and is not community receiving system, but the individual reception system in this stage, can not determine frequency converter frequency.Like this, move on to step S11, frequency converter frequency in step S12, demonstrates warning notices such as " local frequencies of PLSCONFM frequency converter " for what fail to understand, comes can not carry out to user notification the meaning of the automatic setting of frequency converter frequency, then end process.The processing of step S12 goes up display control unit 17 by screen and display circuit 18 is carried out.
In the present embodiment, in the frequency range that first intermediate-freuqncy signal obtains, begin to carry out frequency search from the low-limit frequency side, obtain PAT from the TS signal of initial reception, then, obtain NIT, but, also can when the low-limit frequency side begins to carry out frequency search, only obtain PAT, and when the highest frequency side begins to carry out frequency search, obtain PAT and NIT.
The present invention is not limited in the above embodiments, can carry out various changes in the scope that does not break away from spirit of the present invention.
As above-mentioned detailed description, satellite broadcast receiving device of the present invention, comprise: first acquisition device, begin to carry out frequency search from a side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtain the id number information of its channel and the id number information and the polarized wave information of employed whole channels broadcasting from the transmission stream signal of initial reception; Second acquisition device begins to carry out frequency search from the opposite side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtains the id number information of its channel from the transmission stream signal of initial reception; Recognition device is discerned minimum and polarized wave highest frequency transmission stream signal separately from the id number information and the polarized wave information of whole channels of being obtained by above-mentioned first acquisition device; Judgment means judges whether the polarized wave of transmission stream signal of the polarized wave of transmission stream signal of the low-limit frequency that is obtained by above-mentioned recognition device and highest frequency is different mutually; Setting device according to the local frequency of coming the above-mentioned frequency converter of automatic setting by the judged result that above-mentioned judgment means produced, thus, when being used for community receiving system, does not need to carry out complicated setting, and automatic setting frequency converter frequency simply.
Select Fig. 2 as Figure of abstract
Label declaration in the accompanying drawing:
4: sharing frequency converter
The 5:NIM circuit
6: remove the scramble circuit
7: demultiplexing circuit
The 8:MPEG decoding circuit
9: the picture intelligence handling part
10: sound signal processing portion
17: display control unit on the screen
18: display circuit
Among Fig. 2
S1: begin to carry out frequency search from the low-limit frequency side
S2: obtain PAT from the TS signal of initial captured
S3: obtain NIT
S4: begin to carry out frequency search from the highest frequency side
S5: obtain PAT from the TS signal of initial captured
S6: from the polarized wave of S3 identification S2
S7: from the polarized wave of S3 identification S5
Whether S8:S6 identical with S7?
S9: be community receiving system
S10: set frequency converter frequency
S11: not clear
S12: warning notice shows
Claims (2)
1. satellite broadcast receiving device, can be being transformed to intermediate-freuqncy signal by the frequency converter that is located on the above-mentioned antenna by the digital broadcasting electric wave that antenna received from satellite, obtain picture intelligence and voice signal from this intermediate-freuqncy signal, it is characterized in that, comprising:
First acquisition device, begin to carry out frequency search from a side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtain the id number information of its channel and the id number information and the polarized wave information of employed whole channels broadcasting from the transmission stream signal of initial reception;
Second acquisition device begins to carry out frequency search from the opposite side of the minimum or highest frequency of the frequency range that obtains of above-mentioned intermediate-freuqncy signal, obtains the id number information of its channel from the transmission stream signal of initial reception;
Recognition device is discerned minimum and polarized wave highest frequency transmission stream signal separately from the id number information and the polarized wave information of whole channels of being obtained by above-mentioned first acquisition device;
Judgment means judges whether the polarized wave of transmission stream signal of the polarized wave of transmission stream signal of the low-limit frequency that is obtained by above-mentioned recognition device and highest frequency is different mutually;
Setting device is according to the local frequency of being come the above-mentioned frequency converter of automatic setting by the judged result that above-mentioned judgment means produced.
2. according to the described satellite broadcast receiving device of claim, it is characterized in that, be provided with processing unit, be judged as when identical at the polarized wave of the transmission stream signal of the polarized wave of the transmission stream signal of low-limit frequency and highest frequency, handle can not the above-mentioned local frequency of automatic setting with issue notice.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9159176A JPH10336615A (en) | 1997-06-02 | 1997-06-02 | Satellite broadcast receiver |
| JP97-159176 | 1997-06-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1201300A true CN1201300A (en) | 1998-12-09 |
Family
ID=15687967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98102019A Pending CN1201300A (en) | 1997-06-02 | 1998-05-28 | Satellite broadcast receiving device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH10336615A (en) |
| CN (1) | CN1201300A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444129B (en) * | 2006-05-19 | 2012-08-29 | 艾利森电话股份有限公司 | Method and apparatus for communication system |
-
1997
- 1997-06-02 JP JP9159176A patent/JPH10336615A/en active Pending
-
1998
- 1998-05-28 CN CN98102019A patent/CN1201300A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444129B (en) * | 2006-05-19 | 2012-08-29 | 艾利森电话股份有限公司 | Method and apparatus for communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10336615A (en) | 1998-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1183745C (en) | Didital receiver | |
| CN1254091C (en) | Device and method for channel control of digital TV | |
| JP3564961B2 (en) | Digital broadcast receiver | |
| CN1290329C (en) | Radio VOD system | |
| CN1198460C (en) | Program information guide forming method | |
| CN1306809C (en) | Digital broadcasting receiving apparatus, receiving method and receiving circuit | |
| CN1119900C (en) | System for receiving variable encoding formats and number of transmission channels | |
| CN1157944C (en) | Front end circuit | |
| CN1134984C (en) | System for sampling and processing video data transmitted in different coding form | |
| CN1723695A (en) | The method of the channel of scanning digital TV | |
| CN1946011A (en) | Broadcasting system and method for providing broadcasting service in a weak electric field area | |
| CN1905666A (en) | Broadcasting receiving/transmitting device, wireless a/v system and its control method | |
| CN1477874A (en) | Digital video system and its control method | |
| CN1917650A (en) | Method of transmitting captured image in digital broadcasting reception terminal | |
| CN1171448C (en) | Digital broadcast receiving system, data transmitting method and digital broadcast receiving apparatus | |
| CN1160959C (en) | Digital broadcast receiver, recorder and digital recording method | |
| KR100238024B1 (en) | Apparatus and method for receiving added information in digital satellite broadcasting system | |
| CN1140123C (en) | Receiving, recording and reproduction system for digital broadcasting, and receiving appts. for digital broadcasting | |
| CN1143542C (en) | Receiving device, receiving method and medium therefor | |
| CN1201300A (en) | Satellite broadcast receiving device | |
| CN1263293C (en) | Device for receiving video signals and a method of controlling one such device | |
| CN1941875A (en) | Individual videocorder and method for transmitting broadcast signal into external multimedia apparatus | |
| CN1759608A (en) | Apparatus and method for distributing signals | |
| Shiomi et al. | Digital Broadcasting | |
| CN1732686A (en) | Apparatus and method for providing digital broadcasting service based on multiple broadcasting sites and frequency bands |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1027657 Country of ref document: HK |