CN1937726B - Digital broadcast receiver and digital broadcast receiving method - Google Patents
Digital broadcast receiver and digital broadcast receiving method Download PDFInfo
- Publication number
- CN1937726B CN1937726B CN2006101267674A CN200610126767A CN1937726B CN 1937726 B CN1937726 B CN 1937726B CN 2006101267674 A CN2006101267674 A CN 2006101267674A CN 200610126767 A CN200610126767 A CN 200610126767A CN 1937726 B CN1937726 B CN 1937726B
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- China
- Prior art keywords
- channel
- decoder
- digital broadcast
- deinterleaving
- decoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H40/00—Arrangements specially adapted for receiving broadcast information
- H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
- H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
- H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/38—Demodulator circuits; Receiver circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2201/00—Algorithms used for the adjustment of time-domain equalizers
- H04L2201/06—Algorithms used for the adjustment of time-domain equalizers using the output of a maximum likelihood decoder (Viterbi detector)
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Multimedia (AREA)
- Circuits Of Receivers In General (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The objective is to provide a digital broadcast receiver and digital broadcast receiving method in which hardware is reduced and power consumption is reduced by selectively performing channel decoding only on a channel selected by a user. The digital broadcast receiver of a code division multiplexing type includes: a demodulation section for demodulating a certain channel in code division multiplexed channels; a deinterleave section for deinterleaving the demodulated channel; a channel switching section for selectively switching a predetermined channel selected by a user in the deinterleaved channels, a channel decoding section for performing channel decoding on the switched predetermined channel; and a control section for controlling the channel switching section to switch the predetermined channel selected by the user in the deinterleaved channels.
Description
The application is that on 09 09th, 2004 that submit to, application number is 200410078548.4, denomination of invention is divided an application for the application case of " digital broadcasting transmitter and digital broadcast receiving method thereof ".
The cross reference of related application
The application requires on October 14th, 2003 to submit to the rights and interests of the korean patent application P2003-71338 of Korea S Department of Intellectual Property, and its open text combines with this paper by reference.
Technical field
The present invention relates to a kind of digital broadcasting transmitter; And be particularly related to a kind of digital broadcasting transmitter and digital broadcast receiving method thereof; It deciphers minimum channel selectively from code division multiple access inserts (CDMA) channel, with the quantity and the power consumption of the hardware components that reduces channel decoder.
Background technology
Fig. 1 schematically shows the figure that the general code division multiple access that uses digital broadcasting transmitter inserts the digital broadcasting transmitter of (CDMA) scheme (scheme).
This receiver has demodulator 20, deinterleaver 30, channel decoder 50, video/audio blender 60 and output unit 70.
Some channel (certain channel) that these demodulator 20 demodulation are selected from the CDMA broadcast channel that is received by the user or that select in advance.30 pairs of demodulated channel of deinterleaver deinterleave, and the channel that channel decoder 50 is deciphered after deinterleaving.
Fig. 2 is the figure that explains the digital broadcasting receiving course that is used for digital broadcasting transmitter shown in Figure 1.
As shown in Figure 2, m channel that demodulator 20 demodulation are selected from CDMA Channel by the user or that select in advance, wherein m is an integer.
Deinterleaver 30 has and m the corresponding deinterleaver memory of channel, and the storage of m demodulated channel is at the m that is used for a Bit Interleave deinterleaver memory.After this, a channel connects a channel ground and deciphers m the channel that deinterleaves one by one.
In addition, demodulation is from the control data of pilot channel, and through channel decoder, such as the viterbi decoder that provides respectively, byte deinterleaver and Reed-Solomon (Reed-Solomon) decoder, it deciphered.
As stated; The conventional digital broadcasting receiver has deinterleaver and channel decoder; This channel decoder has the decoder such as viterbi decoder, byte deinterleaver, RS decoder, DEMUX, video/audio decoder etc.; Above-mentioned decoder is to provide with the form of mating one by one with m channel, thereby carries out the channel decoding to all m channel.
Therefore, the channel of conventional digital broadcasting receiver decoding except that the last channel of selecting of user so it is big that the size of conventional channel decoder becomes, and correspondingly has the shortcoming of high power consumption.
Summary of the invention
Therefore, one aspect of the present invention provides a kind of digital broadcasting transmitter and digital broadcast receiving method thereof, and it only deciphers last selected channel selectively, to reduce the quantity and the power consumption of hardware components.
Another aspect of the present invention provides a kind of digital broadcasting transmitter, and it has the common signal channel decoder that is used for broadcast channel and pilot channel.
In order to realize above-mentioned aspect, digital broadcasting transmitter according to the present invention comprises: demodulator is used for some channel of demodulation CDMA Channel; Deinterleaver is used to the demodulated channel that deinterleaves; The channel switch unit is used for selecting to connect the particular channel of being selected from the channel that deinterleaves by the user; Channel decoder is used to decipher the particular channel of being connected; And controller, be used for the control channel switch unit and connect the particular channel of selecting from the channel that deinterleaves by the user.
Best, channel decoder is common to the broadcast channel and the pilot channel that sends control data that load data is sent in decoding.
Channel decoder has and the corresponding channel decoder of particular channel, and channel decoder comprises viterbi decoder, byte deinterleaver and Reed-Solomon decoder.
Particular channel comprises condition access service (CAS) channel, electronic program guides (EPG) channel and pilot channel, and according at least one or a plurality of broadcast channel of user's selection.
Simultaneously, digital broadcast receiving method according to the present invention comprises step: some channel in the demodulation CDMA Channel; Demodulated channel deinterleaves; Select to connect the particular channel of from the channel that deinterleaves, selecting by the user; With the particular channel connected of decoding.
Best, the decoding of channel decoding step is used to send the channel of load data or the control channel that decoding is used to send control data.
Therefore, the last channel of selecting from demodulation and the channel after deinterleaving can be only selected and decipher, therefore can reduce the quantity of hardware components, and receiver power consumption can be correspondingly reduced by the user according to receiver of the present invention.
Description of drawings
Describe the present invention in detail with reference to attached drawings, the identical in the accompanying drawings identical unit of reference number indication, wherein:
Fig. 1 is the block diagram that schematically shows the conventional digital broadcasting receiver;
Fig. 2 is the figure that explains the reception signal process that is used for digital broadcasting transmitter shown in Figure 1;
Fig. 3 schematically shows the block diagram of digital broadcasting transmitter according to an embodiment of the invention;
Fig. 4 is a more detailed block diagram of explaining the digital broadcasting receiving course that is used for digital broadcasting transmitter shown in Figure 3;
Fig. 5 shows the flow chart of the digital broadcast receiving method that is used for digital broadcasting transmitter shown in Figure 3; With
Fig. 6 A shows the figure of digital broadcasting receiving course according to various embodiments of the present invention to Fig. 6 C.
Embodiment
Below, specify the present invention with reference to accompanying drawing.
Fig. 3 schematically shows the block diagram of digital broadcasting transmitter according to an embodiment of the invention.
Digital broadcasting transmitter has demodulating unit 320, deinterleaver 330, channel switch unit 340, channel decoder 350, video/audio blender 360, output unit 370 and controller 380.
320 1 channels of demodulating unit connect a channel ground demodulated channel, and this channel is that the user selects from the CDMA Channel that receives from the receiver (not shown) or selects in advance.
Deinterleaver 330 is the deinterleavers such as bit de-interleaver, and an one of which channel connects a channel ground demodulated channel is deinterleaved.
The particular channel that channel decoder 350 decoding channel switch units 340 are connected.Channel decoding comprises Viterbi decoding, byte decoding and RS decoding, and a channel connects a channel ground to particular channel execution channel decoding.
In addition, for broadcast channel and pilot channel, channel decoder 350 is commonly used to decipher channel, and does not consider input channel.Usually, digital broadcast channel is categorized as the broadcast channel that is used to send load data and is used to send the pilot channel of control data, and correspondingly, different channel decoding schemes is applied to different channels.Therefore, channel decoder 350 according to the present invention is public for broadcast channel and pilot channel.
Video/audio blender 360 with appropriate reproduction regularly mixes and specific decoding channel video signal corresponding, audio signal and additional data, and through output unit 370 outside output mixed signals.
The operation of controller 380 control whole systems, and control channel is selected.Just, controller 380 control channel switch units 340 are selected particular channel according to user's selection from CDMA Channel.
Fig. 4 shows the more detailed block diagram of digital broadcasting transmitter shown in Figure 3, and Fig. 5 shows the flow chart that is used for according to the digital broadcast receiving method of digital broadcasting transmitter of the present invention.With reference to Fig. 4 and Fig. 5, will describe in more detail according to digital broadcast receiving method of the present invention.
Receiver 410 parallel receives are at L the channel (S511) of transmitter side to cut apart such as the predetermined codes of walsh code (Walsh code), and wherein L is an integer.
The information of channel that controller 480 is selected based on relevant user or that select in advance, M the channel (S513) that controlling receiver 410 is selected in L the channel, wherein M is integer and L >=M.
To be input in the demodulator 420 by M the channel that receiver 410 is selected.Demodulator 420 has and M the corresponding M of a channel demodulator.Therefore, channel of M demodulator connects M channel of a channel ground demodulation (S515).
M channel through demodulator 420 demodulation is imported in the bit de-interleaver 430.Bit de-interleaver 430 has and M the corresponding M of a channel deinterleaver memory, and the M that an is imported channel is stored in respectively in the corresponding deinterleaver memory.
After being stored in M channel in M the deinterleaver memory, the 430 pairs of M that is stored channels of bit de-interleaver are carried out bit and are deinterleaved, so that output (S517).Best, do not carry out bit and deinterleave for being included in M the pilot channel in the channel.
The M that in bit de-interleaver 430, a deinterleaves channel is imported into channel switch unit 440.At this moment, channel switch unit 440 is connected last N the channel of selecting by the user according to the control of controller 480, and this N channel is outputed to channel decoder 450 (S519).Just, only will send to channel decoder 450 by a last received N channel.
Therefore, this N channel decoder 450 decoding last selected N channel (S521).
Use specific reproduction regularly, mix to come vision signal, audio signal and the additional data of the last receive channel of decoding in the comfortable channel decoder 450, then, through output unit 370, promptly display unit carries out the outside and shows (S523).
As stated, the present invention only connects last required channel in channel switch unit 440, and these channels are sent to channel decoder 450, thus the hardware components of minimize channel decoder 450, so reduced the power consumption in the system.
In addition, the present invention has advantage: the channel decoder 450 that is common to broadcast channel and pilot channel can be deciphered other broadcast channel when not sending pilot channel.
Fig. 6 A shows the figure of the digital broadcasting receiving course of different embodiment according to the subject invention to Fig. 6 C; Wherein receiver 410 is selected 6 channels from CDMA Channel; And selected channel be stored in respectively in deinterleaver memory 441,442,443,444,445 and 446 and to it deinterleave, and in channel decoder 451,452,453,454 and 455 decoding by last 5 channels selecting of user.
Fig. 6 A shows the figure of following situation: the user has selected channel #0, #1, #2, #3 and #4 at last from the channel #0, #1, #2, #3, #4 and the #5 that deinterleaver memory 441,442,443,444,445 and 446, deinterleave.Shown in Fig. 6 A; Channel switch unit 440 is according to user's last selection; Connection deinterleave channel #0, #1, #2, #3 and #4 in the channel, and channel #0, #1, #2, #3 and #4 outputed to 5 channel decoders 451,452,453,454 and 455 of channel decoder 450 respectively.Therefore, channel decoder 450 is deciphered each of last channel #0, #1, #2, #3 and the #4 that selects.
Simultaneously, under the situation of last selective channel #0, #1, #3, #4 and #5 shown in Fig. 6 B, channel switch unit 440 is correspondingly connected channel #0, #1, #3, #4 and #5, and it is outputed to channel decoder 450.Therefore, channel decoder 450 is deciphered each of last channel #0, #1, #3, #4 and the #5 that selects.
Simultaneously, under the situation of last selective channel #1, #2, #3, #4 and #5 shown in Fig. 6 C, channel switch unit 440 is correspondingly connected channel #1, #2, #3, #4 and #5, and it is outputed to channel decoder 450.Therefore, channel decoder 450 is deciphered each of last channel #1, #2, #3, #4 and the #5 that selects.
As stated, receive required particular channel in order to decipher last signal, 450 of channel decoders need be such as the particular channel decoder of viterbi decoder, byte deinterleaver and RS decoder.
Therefore, the present invention not only can reduce the quantity of the hardware components of this system, also can correspondingly reduce power consumption.
The present invention only selects and deciphers the last channel of selecting from separate the channel that is in harmonious proportion after deinterleaving by the user, thereby reduces the hardware components of channel decoder, and correspondingly reduces the power consumption of receiver.
In addition, the present invention has advantage: can channel decoder be common to broadcast channel and pilot channel, and with the minimizing hardware components, and when not sending pilot channel, the decoding broadcast channel.
Though described the preferred embodiments of the present invention; But those skilled in the art should be understood that and the invention is not restricted to described preferred embodiment; But in the spirit and scope of the present invention that appended claims limited, can do variations and modifications.
Claims (9)
1. broadcasting receiver comprises:
Deinterleaver, M the channel that sign indicating number divides is used for deinterleaving respectively; With
Channel decoder is used for deciphering respectively N channel at M the channel after deinterleaving,
Wherein, the number N of channel is variable.
2. broadcasting receiver as claimed in claim 1, wherein, M is an integer, N is the integer less than M.
3. broadcasting receiver as claimed in claim 1 also comprises the switch unit that is used to switch, so that N channel of the channel of M after deinterleaving optionally sent to channel decoder.
4. broadcast receiving method comprises step:
M the channel that sign indicating number divides deinterleaves respectively; With
N channel in the channel after deciphering M respectively and deinterleaving,
Wherein, the number N of channel is variable.
5. broadcast receiving method as claimed in claim 4, wherein, M is an integer, N is the integer less than M.
6. broadcast receiving method as claimed in claim 4 also comprises switch step, so that N channel quilt of the channel of M after deinterleaving channel decoding optionally.
7. broadcasting receiver comprises:
M memory is used for the channel that sign indicating number divides of store M respectively and deinterleaves; With
N channel decoder is used for receiving N channel of M the channel after deinterleaving, and deciphers the channel of N reception respectively,
Wherein, the number N of channel is variable.
8. broadcasting receiver comprises:
M memory is used for the channel that sign indicating number divides of store M respectively and deinterleaves; With
Switch unit is used for switching so that N the channel that is respectively stored in M memory and quilt M the channel that deinterleaves exported,
Wherein, the number N of channel is variable.
9. broadcasting receiver comprises:
Switch unit is used for switching so that N channel of the channel after exporting M and deinterleaving; With
N channel decoder is used to receive and deinterleaved and from N channel of switch unit output, and deciphers the channel of N reception respectively,
Wherein, the number N of channel is variable.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2003-0071338A KR100512943B1 (en) | 2003-10-14 | 2003-10-14 | Satellite Broadcast receiver and a method Satellite Broadcast receiving thereof |
| KR71338/03 | 2003-10-14 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100785484A Division CN1301007C (en) | 2003-10-14 | 2004-09-09 | Digital broadcast receiver and digital broadcast receiving method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1937726A CN1937726A (en) | 2007-03-28 |
| CN1937726B true CN1937726B (en) | 2012-06-20 |
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ID=34617213
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100785484A Expired - Fee Related CN1301007C (en) | 2003-10-14 | 2004-09-09 | Digital broadcast receiver and digital broadcast receiving method thereof |
| CN2006101267674A Expired - Fee Related CN1937726B (en) | 2003-10-14 | 2004-09-09 | Digital broadcast receiver and digital broadcast receiving method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100785484A Expired - Fee Related CN1301007C (en) | 2003-10-14 | 2004-09-09 | Digital broadcast receiver and digital broadcast receiving method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4223458B2 (en) |
| KR (1) | KR100512943B1 (en) |
| CN (2) | CN1301007C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100690725B1 (en) | 2004-09-08 | 2007-03-09 | 엘지전자 주식회사 | Channel switching apparatus for satellite broadcasting receiver |
| KR100765317B1 (en) * | 2005-07-12 | 2007-10-09 | 삼성전자주식회사 | Apparatus and method of channel changing on digital broadcast system |
| TWI413110B (en) * | 2009-10-06 | 2013-10-21 | Dolby Int Ab | Efficient multichannel signal processing by selective channel decoding |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002080538A1 (en) * | 2001-03-28 | 2002-10-10 | Koninklijke Philips Electronics N.V. | Seamless control of input tv signals |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3666155B2 (en) * | 1996-12-26 | 2005-06-29 | ソニー株式会社 | COMMUNICATION METHOD, TRANSMISSION DEVICE, AND RECEPTION DEVICE |
| FI981757A (en) * | 1998-08-14 | 2000-02-15 | Nokia Networks Oy | Packet switched data transmission in a radio system |
| ES2308796T3 (en) * | 1998-08-21 | 2008-12-01 | Lucent Technologies Inc. | CDMA MULTI-CODE SYSTEM THAT USES AN ITERATIVE DECODIFICATION. |
| KR100539862B1 (en) * | 2001-04-04 | 2005-12-28 | 삼성전자주식회사 | Method and apparatus for transporting and receiving data in cdma mobile system |
-
2003
- 2003-10-14 KR KR10-2003-0071338A patent/KR100512943B1/en not_active IP Right Cessation
-
2004
- 2004-09-09 CN CNB2004100785484A patent/CN1301007C/en not_active Expired - Fee Related
- 2004-09-09 CN CN2006101267674A patent/CN1937726B/en not_active Expired - Fee Related
- 2004-10-14 JP JP2004299523A patent/JP4223458B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002080538A1 (en) * | 2001-03-28 | 2002-10-10 | Koninklijke Philips Electronics N.V. | Seamless control of input tv signals |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301007C (en) | 2007-02-14 |
| JP2005124203A (en) | 2005-05-12 |
| JP4223458B2 (en) | 2009-02-12 |
| CN1607820A (en) | 2005-04-20 |
| KR20050035625A (en) | 2005-04-19 |
| KR100512943B1 (en) | 2005-09-07 |
| CN1937726A (en) | 2007-03-28 |
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