CN1859577A - Audio recording method for digital multimedia broadcasting and device thereof - Google Patents
Audio recording method for digital multimedia broadcasting and device thereof Download PDFInfo
- Publication number
- CN1859577A CN1859577A CNA2006100726220A CN200610072622A CN1859577A CN 1859577 A CN1859577 A CN 1859577A CN A2006100726220 A CNA2006100726220 A CN A2006100726220A CN 200610072622 A CN200610072622 A CN 200610072622A CN 1859577 A CN1859577 A CN 1859577A
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- audio
- dmb
- audio frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
- H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/439—Processing of audio elementary streams
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/60—Receiver circuitry for the reception of television signals according to analogue transmission standards for the sound signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H2201/00—Aspects of broadcast communication
- H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
- H04H2201/11—Aspects of broadcast communication characterised by the type of broadcast system digital multimedia broadcasting [DMB]
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
The invention discloses an AF recording method and device of digital multimedia broadcast, which comprises the following steps: receiving digital multimedia broadcast content; transmitting AF of digital multimedia broadcast into analog AF; transmitting analog AF into AF file of regulated AF pattern; recording AF file. The invention is fit digital multimedia broadcast (DMB), which transmits analog into MP3 AF pattern.
Description
Technical field
The present invention relates to DMB (DMB) technology, particularly the audio recording method of DMB and device thereof.
Background technology
Recently, about DMB (digital multimedia broadcasting; Hereinafter to be referred as DMB) importing and industry use obtain gradually clear.
DMB is a kind of CD of having (Compact Disk-compact disk; Hereinafter to be referred as CD) tonequality of level and can carry out the data/image service, and the multimedia broadcasting of the digital form of outstanding fixing and mobile receiving quality can be provided.Simultaneously, be divided into surface wave DMB that uses surface wave and the satellite dmb that uses satellite according to its conveyer.
Fig. 1 is the schematic diagram of the part-structure of the relevant receiving system of DMB of the prior art, and its example illustrates the device that is used to receive audio frequency among the surface wave DMB.
With reference to accompanying drawing 1, comprise in the DMB receiving system of prior art: frequency modulator (Tuner) 1; Modem chip (modem chip) 2; Audio codec (audio codec) 6; Processor 4 and loud speaker 5.
The high-frequency DMB of described frequency modulator 1 reception is with broadcast singal (being the DMB content) and carry out frequency modulation (turning) operation.
Described modem chip 2 is a kind of DMB chip system (System on Chip), and modem chip 2 is exported digital audio from the DMB content of input to described audio codec 6.
Be provided with audio interface port (audio interface port) 3 in the described audio codec 6, audio codec 6 will be converted to analogue audio frequency by the digital audio of described audio interface port 3 inputs and export.
Described processor 4 is used to control the action of described audio codec 6.
Described loud speaker 5 outputs to the outside with the analogue audio frequency of described audio codec 6 outputs with form of sound.
In the DMB of above-mentioned prior art, particularly, in surface wave DMB, use a kind of general subband integrated encode of self adaptation sound mask characteristic and audio format of complex technique (MUSICAM:Masking patternadapted Universal Sub-band Integrated Coding And Multiplexing) of being called.
Thus, can provide digital audio in real time as the high tone quality of the feature of digital broadcasting.
And, also can memory be set according to circumstances in the receiving system of prior art, make that the audio format that digital audio is converted to described MUSICAM is stored in the DMB content that receives (media of digital video and digital audio combination).
In addition, in the prior art, to the DMB content write down (video recording) or from the DMB content only record (video recording) audio frequency all might offend copyright, therefore, use is useful on the security personnel's algorithm (algorithm) that prevents illegal negative value in whole DMB system.
Its result in the prior art, for making the data of watching or listening to video recording or recording, needs to use the isolated plant that can decode.
For example, when the audio format that with the DMB audio conversion is MUSICAM is stored, need to use the terminal that to decode to the audio format of above-mentioned MUSICAM.
Summary of the invention
For solving problems of the prior art, the object of the present invention is to provide a kind of audio recording method and device thereof of DMB, under the prerequisite of the copyright of not invading DMB (DMB) content (contents), make the user use required DMB (DMB) audio frequency easily.
Another object of the present invention is to provide a kind of audio recording method and device thereof of DMB, can under the level of not violating copyright, write down the audio frequency of DMB (DMB) content.
And, another object of the present invention is to provide a kind of audio recording method and device thereof of DMB, make the audio format that is suitable for the audio frequency of DMB (DMB) content is converted to from simulation level (analog) MP3 (the 3rd layer of MPEG Layer 3-audio frequency dynamic compression).
Reach described purpose for making, the invention provides a kind of audio recording method of DMB, comprise following several steps: the step of receiving digital multimedia broadcastinging content; With the audio conversion of described digital multimedia broadcasting contents is the step of analogue audio frequency; Described analogue audio frequency is converted to the step of the audio file of set audio format; Write down the step of described audio file.
Described DMB is surface wave DMB (TDMB) or digital multimedia broadcast (dmb) via satellite.
Also comprise: the step that described analogue audio frequency is converted to digital audio.Wherein, the digital audio of conversion is converted to the audio file of described audio format.
Described audio format is MP3 (the 3rd layer of a MPEG Layer 3-audio frequency dynamic compression) form, and perhaps described audio format is audio frequency dynamic compression mpeg audio (MPEG Audio) form.
And, reach described purpose for making, the present invention also provides a kind of device that is used to write down the audio frequency of DMB, comprises following several sections: audio codec is used for digital audio with digital multimedia broadcasting contents and is converted to the analogue audio frequency line output of going forward side by side; Switch is used for the analog signal fork of described audio codec output is a plurality of paths; Converter section, the analog signal conversion with described audio codec output on a path of diverge by described switch (turnout) is a digital signal; Processor is converted to the digital audio of described converter section output the audio file of set audio format.
Described device is installed in the described DMB of removable reception with on portable (Hand-held) terminal of content.
By set user interface requests fork during for described a plurality of path, described switch will move according to described request.
Wherein, described user interface is the set key (key) that the user operates.Thus, when the user presses described set key, described switch will move and the analogue audio frequency fork of exporting in the described audio codec will be a plurality of paths.
Also comprise: loud speaker, on by another path of described switch fork, the analogue audio frequency of described audio codec output is exported to the outside.Thus, described processor can be exported the audio file of changing by described loud speaker.
Also comprise: memory is used to store the audio file of changing.
Described processor is to have the portable terminal modulator-demodulator (MSM:Mobile Station Modem) that described digital audio is converted to the audio file function of described audio format.
Described audio format is MP3 (the 3rd layer of a MPEG Layer 3-audio frequency dynamic compression) form.
According to aforesaid the present invention, do not violating under the simulation level of copyright, be the audio format of MP3 (the 3rd layer of MPEG Layer 3-audio frequency dynamic compression) the form line item of going forward side by side with the audio conversion of DMB content.
Thus; in the copyright of not invading DMB (DMB) content (contents); need not to use the attachment device that is used to protect digital content; thereby make the user can be, and use required DMB audio frequency in fixed multimedia receiver terminal or the home computer's fixed terminals such as (Personal computer) easily at portable terminals such as micro television, PDA and mobile communication terminals.
Description of drawings
Fig. 1 is the schematic diagram of the part-structure of the relevant receiving system of DMB of the prior art (DMB);
Fig. 2 is the schematic diagram of the structure of the relevant receiving system of the DMB (DMB) in one embodiment of the invention;
Fig. 3 is the schematic diagram of the audio recording step of the DMB (DMB) in one embodiment of the invention.
Embodiment
Structure and effect to the embodiment among the present invention describes with reference to the accompanying drawings, point out out structure of the present invention and effect to describe in the accompanying drawing, but technological thought among the present invention and core texture and effect are not to be defined in the foregoing description by at least one embodiment.
Basic fundamental thought of the present invention is, receive DMB with broadcast singal (hereinafter referred to as the DMB content) after, the digital audio of described DMB content is converted to analogue audio frequency, and the analogue audio frequency of conversion is exported by loud speaker.
Particularly, in the present invention, make the analogue audio frequency of conversion branch to the outgoing route of other audio path rather than loud speaker, simultaneously, be digital audio with the corresponding simulating audio conversion and the digital audio of conversion offered processor.At this moment, described processor is converted to the digital audio of input the audio file (or audio signal) of predefined audio format.And, described processor with the conversion audio files storage in memory.
Below the present invention is described in more detail.
Fig. 2 is the schematic diagram of the structure of the relevant receiving system of the DMB in one embodiment of the invention.
With reference to accompanying drawing 2, comprise in the DMB receiving system of the present invention: frequency modulator (Tuner) 10; Modem chip (modem chip) 20; Audio codec (audio codec) 30; Processor 40; Loud speaker 50 and switch 60.
Described frequency modulator 10 receives high-frequency DMB content and carries out frequency modulation (turning) operation.
Described modem chip 20 is a kind of DMB chip system (System on Chip), and modem chip 20 is exported digital audio from the DMB content of input to described audio codec 30.
Be provided with audio interface port (audio interface port) 31 in the described audio codec 30, audio codec 30 will be converted to analogue audio frequency by the digital audio of described audio interface port 31 inputs and export.
In addition, under the situation of accompanying drawing 2, also be provided with the following capable input port that will illustrate (Line input port) 32 and other audio interface port 34 in the described audio codec 30.
In the present invention, also consider capable input port (the Line input port) 32 that be not provided with in the described audio codec 30 among Fig. 2 and other audio interface port 34 but situation about being provided with in addition.
Described switch 60 is used for the analog signal fork of described audio codec 30 outputs is a plurality of audio paths, wherein, an audio path is the path of loud speaker 50, and another audio path is the path of the capable input port 32 of setting in the described audio codec 30.
In addition, in the present invention, control described switch 60 according to user's solicit operation the analogue audio frequency fork is a plurality of audio paths, promptly, when the set user interface (userinterface) that is provided with in by receiving system was asked fork for a plurality of audio path, described switch 60 will move according to the signal of described request.
When the receiving system among the present invention is installed under the situation of mobile communication terminal, described user interface is preferably for the set key (key) of user's operation.When the user presses described set key, button operation will be identified as the analogue audio frequency fork will be the request of a plurality of audio paths, and thus, described switch 60 will move according to button operation.According to the action of described switch 60, the analogue audio frequency of output will diverge and be the path of loud speaker 50 and the path of row input port 32 in the described audio codec 30.
Described loud speaker 50 outputs to the outside with form of sound, 50 influences that are not subjected to the action of switch 60 of described loud speaker with the analogue audio frequency of described audio codec 60 outputs.
When described switch 60 moves, described loud speaker 50 will only be exported the analog signal that switch 60 actions are diverged down and exported for one of them path in a plurality of paths to the outside.
And described converter section 33 is converted to digital audio with the analogue audio frequency of input in the described capable input port 32, and the digital audio of converter section 33 outputs then sends processor 40 to by other Audio Interface Unit 34.
Described processor 40 is used for the digital audio of input is converted to the audio file of predefined audio format.
Described processor 40 will provide the environment of setting as the MP3 (the 3rd layer of MPEG Layer 3-audio frequency dynamic compression) of convertible audio format and at least more than one the form among mpeg audio (MPEG Audio-audio frequency dynamic compression), WMA (windowmedia audio-form multimedia audio), WAV (word audio video-waveform sound file) and the MIDI (musical instrument digital interface-musical instrument digital interface) to the user.That is, described processor 40 will provide the user can select the function of above-mentioned audio format.
In the present invention, preferably be converted to the MP3 format that is close to CD Quality from described audio format, but be more preferably, the selection function of the audio format that the user provides by described processor 40 is converted to the audio file of predefined audio format.
In addition, also be provided with memory (not shown) in the DMB receiving system of the present invention, described processor 40 with the input digital audio be converted to the audio file of predefined audio format after, with the conversion audio files storage in described memory.
And described processor 40 is exported the audio file of conversion when described digital audio is converted to the audio file of predefined audio format by described loud speaker 50.In addition, described processor 40 is also exported the audio file of storing in advance in the described memory by described loud speaker 50.
Described processor 40 preferably constitutes by having the portable terminal modulator-demodulator (MSM:Mobile Station Modem) of function that digital audio is converted to the audio file of set audio format.
In addition, the DMB receiving system of described Fig. 2 preferably is installed in micro television, PDA (PersonalDigital Assistant-personal digital assistant), mobile communication terminal etc. and guarantees mobility and portable and can carry out Multimedia Mobile and receive on portable (Hand-held) terminal of operation.But applicable object of the present invention is not to be defined in above-mentioned portable terminal, and except above-mentioned portable terminal, the present invention also can be equally applicable in fixed multimedia receiver terminal or the home computer fixed terminals such as (Personal Computer).
Fig. 3 is the schematic diagram of the audio recording step of the DMB in one embodiment of the invention.
With reference to accompanying drawing 3, the DMB receiving system receives the DMB content (seeing step S10) that includes the DMB audio frequency; Described DMB content is generally the media in conjunction with digital video and digital audio.
Be operating as its feature with processing among the present invention, therefore, will the operation of DMB receiving system reception DMB audio frequency be described below the DMB audio frequency.
In addition, the audio codec that is provided with in the DMB receiving system is analogue audio frequency (seeing step S11) with the DMB audio conversion that receives, wherein, and preferably decode the digital audio of (Decoding) of the DMB audio frequency of importing in the described audio codec.Therefore, the DMB that is provided with in the DMB receiving system decodes (Decoding) to the DMB audio frequency that receives with modem chip, and the DMB audio frequency of will decode (Decoding) sends in the audio codec.Subsequently, described audio codec is converted to analogue audio frequency with described DMB with the digital audio that modem chip transmits.
The analogue audio frequency of changing in described audio codec will be that export in two paths by the switch fork.
Wherein, a path is the outgoing route of loud speaker, and loud speaker outputs to outside (seeing step S12) with the analogue audio frequency of exporting in the described audio codec with form of sound.
In addition, another path is after converting analogue audio frequency to digital audio again, make it be converted to the path of the audio file of set audio format, on described path, converter section is converted to digital audio (seeing step S13) with described analogue audio frequency, and processor then is converted to the digital audio of conversion the audio file (seeing step S14) of set audio format.
Described audio format is at least more than one the form in MP3 and MPEG, WMA, WAV and the MIDI audio frequency.
Point out out processor the digital audio of conversion to be converted to the situation of the audio file of MP3 format among Fig. 3.
Then, described processor is recorded in the audio file of changing in the memory and (sees step S15).
Abovely be illustrated with reference to Fig. 2 and Fig. 3 couple of the present invention relevant with DMB (DMB), the present invention particularly is applicable among the surface wave DMB, and the present invention also can be equally applicable in the satellite dmb.
The foregoing description only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (16)
1. the audio recording method of a DMB is characterized in that, comprises following several steps:
The step of receiving digital multimedia broadcastinging content;
With the audio conversion of described digital multimedia broadcasting contents is the step of analogue audio frequency;
Described analogue audio frequency is converted to the step of the audio file of set audio format;
Write down the step of described audio file.
2. the audio recording method of DMB according to claim 1 is characterized in that, described DMB is surface wave DMB or digital multimedia broadcast (dmb) via satellite.
3. the audio recording method of DMB according to claim 1 is characterized in that, also comprises: the step that described analogue audio frequency is converted to digital audio.
4. the audio recording method of DMB according to claim 3 is characterized in that,
The described digital audio of conversion is converted to the audio file of described audio format.
5. the audio recording method of DMB according to claim 1 is characterized in that,
Described audio format is a MP3 format.
6. the audio recording method of DMB according to claim 1 is characterized in that,
Described audio format is the mpeg audio form.
7. a device that is used to write down the audio frequency of DMB is characterized in that, comprising:
Audio codec is used for digital audio with digital multimedia broadcasting contents and is converted to the analogue audio frequency line output of going forward side by side;
Switch is used for the analog signal fork of described audio codec output is a plurality of paths;
Converter section, the analog signal conversion of on a path by described switch fork described audio codec being exported is a digital signal;
Processor is converted to the digital audio of described converter section output the audio file of set audio format.
8. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that, described device is installed in the described DMB of removable reception with on the portable terminal of content.
9. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that, by set user interface requests fork during for described a plurality of path, described switch will move according to described request.
10. the device that is used to write down the audio frequency of DMB according to claim 9 is characterized in that described user interface is the set key that the user operates.
11. the device that is used to write down the audio frequency of DMB according to claim 10, it is characterized in that, when the user presses described set key, described switch will move and the analogue audio frequency fork of exporting in the described audio codec will be a plurality of paths.
12. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that, also comprises:
Loud speaker is exported the analogue audio frequency of described audio codec output on by another path of described switch fork to the outside.
13. the device that is used to write down the audio frequency of DMB according to claim 12 is characterized in that, the described audio file that described processor is changed by described loud speaker output.
14. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that also comprise: memory is used to store the described audio file of changing.
15. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that described processor is to have the portable terminal modulator-demodulator that described digital audio is converted to the audio file function of described audio format.
16. the device that is used to write down the audio frequency of DMB according to claim 7 is characterized in that described audio format is a MP3 format.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050037537A KR100710382B1 (en) | 2005-05-04 | 2005-05-04 | Method for recording audio of DMB, and apparatus for the same |
| KR1020050037537 | 2005-05-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1859577A true CN1859577A (en) | 2006-11-08 |
Family
ID=37298432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100726220A Pending CN1859577A (en) | 2005-05-04 | 2006-04-05 | Audio recording method for digital multimedia broadcasting and device thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100710382B1 (en) |
| CN (1) | CN1859577A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11112449A (en) | 1997-09-29 | 1999-04-23 | Alpine Electron Inc | Multiplex broadcast receiver |
| JP2000105989A (en) | 1998-09-28 | 2000-04-11 | Kenwood Corp | Av system |
| US7085377B1 (en) | 1999-07-30 | 2006-08-01 | Lucent Technologies Inc. | Information delivery in a multi-stream digital broadcasting system |
| GB0307451D0 (en) | 2003-03-31 | 2003-05-07 | Matsushita Electric Ind Co Ltd | Digital receiver with aural interface |
| KR100490258B1 (en) * | 2003-04-30 | 2005-05-17 | 실리샌드 주식회사 | Digital audio broadcasting receier and operating methode thereof |
| KR20060068338A (en) * | 2004-12-16 | 2006-06-21 | 주식회사 대우일렉트로닉스 | Method for recording and playing audio by using digital audio broadcasting |
-
2005
- 2005-05-04 KR KR1020050037537A patent/KR100710382B1/en not_active IP Right Cessation
-
2006
- 2006-04-05 CN CNA2006100726220A patent/CN1859577A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060115173A (en) | 2006-11-08 |
| KR100710382B1 (en) | 2007-04-23 |
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