CN1564596A - Caraoke on-demand system based on one-way wired digital television network - Google Patents
Caraoke on-demand system based on one-way wired digital television network Download PDFInfo
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Abstract
The invention consists of the cable digital TV set-top box, the HFC network, the data management/dispatching server and data broadcast server. The above data management/dispatching server is connected with the data broadcast server through the communication interface. The above data broadcast server is connected with the cable digital TV set-up box through broadcast card and HFC network. The invention also discloses a display method of order program system. The data management/dispatching server generate the audio file of the song, the text file of the song, the video file and program list. The audio file is cut and is transmitted to the set-top box through the broadcast card of the data broadcast server. After user browses the program list and orders a song, the set-top box displays the song through TV set.
Description
Technical field
The present invention relates to a kind of Karaoke VOD system and player method thereof, relate in particular to a kind of Karaoke VOD system and player method thereof based on unidirectional Cable Network network based on Hybrid Fiber Coaxial (HFC) and cable television digital set-top box.
Background technology
Kara OK function is rooted in the hearts of the people as a popular entertainment selection.The present equipment with Kara OK function all needs the bilateral network support, perhaps needs the local program of preserving of jumbo hard disk.How can not have the top box of digital machine of hard disk in most basic models and realize Kara OK function, help attracting more user to add the camp of Digital Television naturally, thereby advance the Digital Television fast development based on unidirectional Cable Network network (HFC).
Summary of the invention
The object of the present invention is to provide a kind ofly under unidirectional Cable Network network (HFC) environment, need not just can realize user the Karaoke VOD system and the player method thereof based on unidirectional Cable Network network of program request Kara OK songs function at any time by return path.
Purpose of the present invention is achieved by the following technical programs:
A kind of Karaoke VOD system based on unidirectional Cable Network network provided by the invention comprises cable television digital set-top box and hfc plant, also comprises following server:
1) data management dispatch server promptly is used for the generation and the management of programme information, and the management of user's use and program broadcast;
2) broadcast data server promptly is used for the program that the data management dispatch server generates is transferred to cable television digital set-top box by broadcast card through hfc plant;
Described data management dispatch server is connected with broadcast data server by its communication interface, and broadcast data server is connected on the cable television digital set-top box through hfc plant by broadcast card.
Cable television digital set-top box support of the present invention is based on the One-to-All Broadcast formula and support two-way passback gateway (optional), comprise the application that PSTN, CableModem, ISDN, mobile phone, SMS etc. are realized, the RAM configuration requirement of cable television digital set-top box is low, need not the local program of preserving of hard disk, adopt television set or other-end device as display device, be used for receiving digital television signal.The data management dispatch server is used to generate and manage the song of Karaoke and the song index information of lyrics data and all broadcasts, and can through unidirectional Cable Network network (HFC) data information transfer be arrived cable television digital set-top box by broadcast data server.Cable television digital set-top box obtains the tabulation of song index information display program, and after user's program request song, cable television digital set-top box is searched and play this song of demonstration by terminal equipments such as television sets.
Broadcast data server of the present invention has one or more, and each broadcast data server is connected with described data management dispatch server respectively.
Data management dispatch server of the present invention comprises following modules:
1) user authority management module, the i.e. user authority management of the editor of music program, audit, broadcast;
2) video frequency program administration module promptly is used for the management of program background sound video file;
3) music program administration module promptly is used for the management of program song audio files and corresponding lyrics file;
4) broadcast data server administration module promptly is used for the data broadcasting server taken turns and broadcasts configuration management;
5) program scheduler module promptly is used for the lyrics file of program song audio files, correspondence and the index information of video file are generated the broadcast program list according to certain data format; Adopt the song segmentation algorithm simultaneously, each first song audio files of input is cut apart; Generate the playing programs configuration file and song audio files and program background video file with the broadcast items list, after cutting apart are sent on the broadcast data server.
The index information of the song that the data management dispatch server need be play each broadcast data server by the program scheduler module, the lyrics and video file generates the broadcast program list according to certain data format, so that set-top box can be obtained corresponding data information.In the broadcast program list generative process, partitioning algorithm according to song files, automatically the first song files of each that will import is divided into several parts of different sizes, be convenient to transmission and cable television digital set-top box buffered audio data, simultaneously according to every first bandwidth of being distributed of singing, automatically realize the data optimization transmission, make the user wait for that the time of beginning played songs is the shortest.
The playing programs profile information that broadcast data server generates according to the data management dispatch server, cut apart good song each several part audio data file, background video data file and programme (comprising lyrics data) that all needs wheels are broadcast distribute different transport stream, by different transmission rates, be transferred to top box of digital machine by hfc plant, what transmission was adopted is the DVB standard.The broadcast card of broadcast data server of the present invention has DVB data broadcast standard form, support four kinds of transmission meanss of DVB definition: data pipe (Data Pipe), data flow (Data Stream), multi-protocols encapsulation (Multiple Protocol Encapsulation), data/object carousel (Data/Object Carousel).Separately broadcasting of sound, video frequency program (like this can conserve bandwidth), MPEG-1, MPEG-2 or MPEG-4 standard are adopted in the coding of sound, video frequency program, compression.
Whether have the right to use for detecting the user, the present invention comprises also and is used for conditional receiving device that the transport stream that the data broadcasting server sends is encrypted that this device is connected with broadcast data server, and is connected with cable television digital set-top box through hfc plant.Transport stream with broadcast data server sends after conditional receiving device (IrdetoCA, the CA of the Union of Central Vision etc.) encryption, is transferred to top box of digital machine, and whether set-top box detects the user and be authorized to, if be authorized to, then sound, video data are obtained in deciphering.
The player method of described Karaoke VOD system based on unidirectional Cable Network network provided by the invention comprises the following steps:
1) make song audio files, lyrics file and video file, the user makes song by the song tools becomes the song audio files with audio data format; According to the rhythm of song, be lyrics file with Karaoke lyrics data form with the lyrics text-converted of importing; The selecting video file is as the background of song;
Song is made: the user preserves after the music program file of different audio data format being converted into the data format of Mp2 or Mp1 by the song tools, supports the audio data format of conversion also to comprise other audio format such as CD, MP3, WMA, WAV, RAW.In addition, also can change, directly use Mp3 and other audio format song.
The lyrics are made: the user can be by manual or automatic mode, rhythm according to song, the lyrics text-converted of input is the data format of the lyrics of playing Karaoka, thereby guarantees on cable television digital set-top box, to realize that the lyrics demonstration and the playing progress rate of song are complementary.
2) with song audio files, lyrics file and video file input data management dispatch server, its music program administration module manages song audio files and lyrics file, and the video frequency program administration module manages video file; The program scheduler module generates the broadcast program list with certain data format with the index information of song audio files, lyrics file and video file simultaneously;
3), adopt the song segmentation algorithm that the song audio files of each first song is cut apart, and generate the playing programs configuration file by the program scheduling administration module;
4) broadcast data server is according to the playing programs profile information, cut apart good each several part song audio files, lyrics file, video file and broadcast program list that all needs wheels are broadcast distribute different transport stream, by different transmission rates, be transferred to cable television digital set-top box through hfc plant by broadcast card;
5) the broadcast program list that top box of digital machine obtains and the buffer memory front end is broadcasted is tabulated according to the index information display program in the broadcast program list; After user's program request song, cable television digital set-top box finds the transport stream that wheel is broadcast first's voice data of this song audio files, this voice data of buffer memory immediately; Meanwhile, search transport stream and the follow-up audio data content of buffer memory that wheel is broadcast other a few part voice datas of this song audio files;
6) behind the voice data of the intact first of buffer memory, set-top box is decoded and is begun audio program and background video program by the hardware decoding chip of itself and plays, and uses captions that the lyrics data file guarantees reality and accompaniment synchronously; Continue the voice data of other several parts of buffer memory simultaneously, up to buffer memory and play complete first song.
Player method of the present invention also can be done following further improvement: the lyrics file that comprises one or more video flowings, a plurality of audio stream and audio stream correspondence in the described step 4) on each transport stream, video flowing can combine with a plurality of audio streams and corresponding lyrics file, forms a plurality of different Karaoke programs. The data message that broadcast data server transmits is encrypted after hfc plant is sent on the cable television digital set-top box by conditional receiving device; Whether set-top box detection user is authorized in the described step 5), if be authorized to, then data message is obtained in deciphering.
Player method completing steps 6 of the present invention) play complete first song after, preengage next song of program request according to the user, cable television digital set-top box begins buffer memory in advance, and next has cut apart the voice data of good song audio files.In addition, can also in songs playing process, realize suspending.The data format of the song audio files in the described step 5) is Mp1, Mp2 or Mp3.The data format of the song audio files of the song tools support input in the described step 1) is CDA, WMA, WAV, RAW, AC3, AVI, MID or DAC.
Cut apart audio file according to following partitioning algorithm in the step 3) of player method of the present invention:
A. the playback rate of setting audio file is PS, the reproduction time of audio file is PT, total transmission bandwidth of audio file is Bw, total audio file file division piece number is that 2 and every block size are respectively Head, Body, cut apart back Head, the size of the download transmission rate of Body all is Tp, and the size of set-top box buffer memory audio file is CASHE;
B. Theoretical Calculation is according to as follows: the size of audio file is PS*PT, i.e. Head+Body=PS*PT; When the total transmission bandwidth Bw=Tp*2 of audio file, the download time of Head is the shortest; The download time of Head is Head/Tp, and the reproduction time of Head is Head/PS, and the download time of Body is Body/Tp, Head/Tp+Head/PS＞=Body/Tp; Big or small CASHE=Head+ (Head/Tp) the * PS of set-top box buffer memory audio file;
C. preestablish the available minimal cache of the whole network user side " Karaoke "; Utilize the program scheduling administration module of data management dispatch server to draw the playback rate PS of this song audio files and the reproduction time length PT of audio file according to automatic identification of song files; The big or small CASHE of reader top box buffer memory audio file finds the solution above-mentioned inequation Head/Tp+Head/PS＞=Body/Tp by exhaust algorithm then;
D. calculate: the Tp minimum value that meets the demands, the value of Head, Body, Bw value, the download time of Head;
E. according to result calculated, use redundancy factor suitably to increase Tp and corresponding Bw, cut apart audio file according to result calculated at last and play according to Tp.
The present invention has following beneficial effect:
(1) under unidirectional Cable Network network (HFC) environment, need not just can realize user's program request Kara OK songs function at any time by return path;
(2) hardware configuration is few, and connected mode is easy;
(3) song files is cut apart, the data broadcasting server is taken turns broadcast configuration, be convenient to the cable television digital set-top box buffered audio data, make the user wait for that the time of broadcast is the shortest.
Description of drawings
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing:
Fig. 1 is the structured flowchart of the embodiment of the invention;
Fig. 2 is that cable television digital set-top box receives the decoding schematic diagram in the embodiment of the invention;
Fig. 3 is the composition frame chart of data management dispatch server in the embodiment of the invention;
Fig. 4 is the program request FB(flow block) of cable television digital set-top box in the embodiment of the invention.
Embodiment
Fig. 1～Figure 4 shows that of the present invention based on the Karaoke VOD system of unidirectional Cable Network network and the embodiment of player method thereof.
The Karaoke VOD system based on unidirectional Cable Network network of present embodiment comprises cable television digital set-top box, hfc plant, data management dispatch server, broadcast data server and conditional receiving device as shown in Figure 1.The data management dispatch server is connected with broadcast data server by its communication interface, and broadcast data server is connected with conditional receiving device by broadcast card and is connected on the cable television digital set-top box through hfc plant.
The cable television digital set-top box support is based on the One-to-All Broadcast formula and support two-way passback gateway (optional), comprise the application that PSTN, CableModem, ISDN, mobile phone, SMS etc. are realized, the RAM configuration requirement of cable television digital set-top box is low, need not the local program of preserving of hard disk, adopt television set or other-end device as display device, be used for receiving digital television signal.The basic function of cable television digital set-top box is receiving the decode of digital television broadcasting, as shown in Figure 2, the tuner module received RF signal also down-converts to intermediate-freuqncy signal, carry out the A/D conversion then and become digital signal, send into demodulation module again and carry out the QAM demodulation, output mpeg transport stream serial or parallel data.Demultiplexing module receives mpeg transport stream, and the PES data of therefrom extracting a program out comprise video PES, audio frequency PES.Comprise a descrambling engine in the demultiplexing module, can carry out descrambling to the data of scrambling in transport stream layer and PES layer.Video PES sends into the video decode module, and the MEPG video data is decoded, and outputs to the PAL/NTSC encoder then, is encoded into anolog TV signals, exports through video output circuit again.Audio frequency PES sends into the audio decoder module, and the mpeg audio data are decoded, and output pcm audio data are to PCM decoder, and PCM decoder is exported stereo simulated audio signal, exports through audio output circuit.
The data management dispatch server is used for generation and management and user's the use and the management that program broadcasts of programme information, and its hardware configuration is as follows:
| Minimal configuration | Proposed arrangement | |
| ????CPU | ????PIII?700 | Dominant frequency is high more good more |
| Internal memory | ????256M | ????512M |
| Hard disk | 40G (5000 first song) | More than the 120G |
| Network | The 10M network interface card | More than the 100M network interface card |
| Operating system | Window or LINUX | |
| Database | ??POSTGRE |
As shown in Figure 3, the data management dispatch server comprises following modules: 1) user authority management module, the i.e. user authority management of the editor of music program, audit, broadcast; 2) video frequency program administration module promptly is used for the management of program background sound video file; 3) music program administration module promptly is used for the management of program song audio files and corresponding lyrics file; 4) broadcast data server administration module promptly is used for the data broadcasting server taken turns and broadcasts configuration management; 5) program scheduler module promptly is used for the lyrics file of program song audio files, correspondence and the index information of video file are generated the broadcast program list according to certain data format; Adopt the song segmentation algorithm simultaneously, each first song audio files of input is cut apart; Generate the playing programs configuration file and song audio files and program background video file with the broadcast items list, after cutting apart are sent on the broadcast data server.
Broadcast data server is used for the program that the data management dispatch server generates is transferred to cable television digital set-top box by broadcast card through hfc plant, and its hardware configuration is as follows:
| Minimal configuration | Proposed arrangement | |
| ??CPU | PIII?700 | Dominant frequency is high more good more |
| Internal memory | 256M or more than | More than the 512M |
| Operating system | Window or LINUX | |
| Network | The 10M network interface card | More than the 100M network interface card |
| Broadcast card | MediaPump XL 503 cards |
The broadcast card of broadcast data server has DVB data broadcast standard form, support four kinds of transmission meanss of DVB definition: data pipe (Data Pipe), data flow (Data Stream), multi-protocols encapsulation (Multiple ProtocolEncapsulation), data/object carousel (Data/Object Carousel).
The player method based on the Karaoke VOD system of unidirectional Cable Network network of present embodiment comprises the following steps:
1) makes song audio files, lyrics file and video file.
The user preserves after the music program file of different audio data format being converted into the data format of Mp2 or Mp1 by the song tools, supports the audio data format of conversion also to comprise other audio format such as CD, MP3, WMA, WAV, RAW.In addition, also can change, directly use Mp3 and other audio format song; Rhythm according to song, the user can be by manual or automatic mode, rhythm according to song, the lyrics text-converted of input is the lyrics file of lyrics data form of playing Karaoka, thereby guarantees on cable television digital set-top box, to realize that the lyrics demonstration and the playing progress rate of song are complementary; The selecting video file is as the background of song.
2) with song audio files, lyrics file and video file input data management dispatch server, its music program administration module manages song audio files and lyrics file, and the video frequency program administration module manages video file; The program scheduler module generates the broadcast program list with certain data format with the index information of song audio files, lyrics file and video file simultaneously.
3), adopt the song segmentation algorithm that the song audio files of each first song is cut apart, and generate the playing programs configuration file by the program scheduler module.
The partitioning algorithm of audio file is as follows:
A. the playback rate of setting audio file is PS, the reproduction time of audio file is PT, total transmission bandwidth of audio file is Bw, total audio file file division piece number is that 2 and every block size are respectively Head, Body, cut apart back Head, the size of the download transmission rate of Body all is Tp, and the size of set-top box buffer memory audio file is CASHE;
B. Theoretical Calculation is according to as follows: the size of audio file is PS*PT, i.e. Head+Body=PS*PT; When the total transmission bandwidth Bw=Tp*2 of audio file, the download time of Head is the shortest; The download time of Head is Head/Tp, and the reproduction time of Head is Head/PS, and the download time of Body is Body/Tp, Head/Tp+Head/PS＞=Body/Tp; Big or small CASHE=Head+ (Head/Tp) the * PS of set-top box buffer memory audio file;
C. preestablish the available minimal cache of the whole network user side " Karaoke "; Utilize the program scheduling administration module of data management dispatch server to draw the playback rate PS of this song audio files and the reproduction time length PT of audio file according to automatic identification of song files; The big or small CASHE of reader top box buffer memory audio file finds the solution above-mentioned inequation Head/Tp+Head/PS＞=Body/Tp by exhaust algorithm then;
D. calculate: the Tp minimum value that meets the demands, the value of Head, Body, Bw value, the download time of Head;
E. according to result calculated, use redundancy factor suitably to increase Tp and corresponding Bw, cut apart audio file according to result calculated at last and play according to Tp.
4) broadcast data server is according to the playing programs profile information, cut apart good each several part song audio files, lyrics file, video file and broadcast program list that all needs wheels are broadcast distribute different transport stream, by different transmission rates, the mode that adopts one or more background video streams to combine with a plurality of audio transport stream packets transmits, and audio frequency and background video transmit in same transport stream; Broadcast data server is encrypted after hfc plant is sent on the cable television digital set-top box by conditional receiving device by the data message that broadcast card transmits.
5) whether top box of digital machine detection user is authorized to, if be authorized to, then data message is obtained in deciphering.As shown in Figure 4, the broadcast program list that top box of digital machine obtains and the buffer memory front end is broadcasted is tabulated according to the index information display program in the broadcast program list; After user's program request song, cable television digital set-top box finds the transport stream that wheel is broadcast first's voice data of this song audio files, this voice data of buffer memory immediately; Meanwhile, search transport stream and the follow-up audio data content of buffer memory that wheel is broadcast other a few part voice datas of this song audio files.
6) behind the voice data of the intact first of buffer memory, set-top box is decoded and is begun audio program and background video program by the hardware decoding chip of itself and plays, and uses captions that the lyrics data file guarantees reality and accompaniment synchronously; Continue the voice data of other several parts of buffer memory simultaneously, up to buffer memory and play complete first song.In addition, can also in songs playing process, realize suspending.
7) after the complete first song of broadcast, preengage next song of program request as the user, cable television digital set-top box begins buffer memory in advance, and next has cut apart the voice data of good song audio files; Otherwise show the music program tabulation.
Adopt following charge method:
(1) monthly payment formula, this service and user smart card binding, the user can this service of unrestricted enjoyment.Has certain time limit.
(2) mode of real charging, the user can license this service a period of time by the mode notified on authorization side of outer mutual (comprising PSTN, CableModem, ISDN, mobile phone, SMS etc.), and is charged according to time.
Claims (11)
1, a kind of Karaoke VOD system based on unidirectional Cable Network network comprises cable television digital set-top box and hfc plant, it is characterized in that: also comprise following server:
A) data management dispatch server promptly is used for the generation and the management of programme information, and the management of user's use and program broadcast;
B) broadcast data server promptly is used for the program that the data management dispatch server generates is transferred to cable television digital set-top box by broadcast card through hfc plant;
Described data management dispatch server is connected with broadcast data server by its communication interface, and broadcast data server is connected on the cable television digital set-top box through hfc plant by broadcast card.
2, the Karaoke VOD system based on unidirectional Cable Network network according to claim 1, it is characterized in that: described broadcast data server has one or more, and each broadcast data server is connected with described data management dispatch server respectively.
3, the Karaoke VOD system based on unidirectional Cable Network network according to claim 1 and 2, it is characterized in that: described data management dispatch server comprises following modules:
1) user authority management module, the i.e. user authority management of the editor of music program, audit, broadcast;
2) video frequency program administration module promptly is used for the management of program background sound video file;
3) music program administration module promptly is used for the management of program song audio files and corresponding lyrics file;
4) broadcast data server administration module promptly is used for the data broadcasting server taken turns and broadcasts configuration management;
5) program module promptly is used for the lyrics file of program song audio files, correspondence and the index information of video file are generated the broadcast program list according to certain data format; Adopt the song segmentation algorithm simultaneously, each first song audio files of input is cut apart; Generate the playing programs configuration file and song audio files and program background video file with the broadcast items list, after cutting apart are sent on the broadcast data server.
4, the Karaoke VOD system based on unidirectional Cable Network network according to claim 1, it is characterized in that: the broadcast card of described broadcast data server has DVB data broadcast standard form.
5, the Karaoke VOD system based on unidirectional Cable Network network according to claim 1, it is characterized in that: also comprise being used for conditional receiving device that the transport stream that the data broadcasting server sends is encrypted, this device is connected with broadcast data server, and is connected with cable television digital set-top box through hfc plant.
6, the player method based on the Karaoke VOD system of unidirectional Cable Network network of claim 1 is characterized in that, comprises the following steps:
1) make song audio files, lyrics file and video file, the user makes song by the song tools becomes the song audio files with audio data format; According to the rhythm of song, be lyrics file with Karaoke lyrics data form with the lyrics text-converted of importing; The selecting video file is as the background of song;
2) with song audio files, lyrics file and video file input data management dispatch server, its music program administration module manages song audio files and lyrics file, and the video frequency program administration module manages video file; The program scheduling administration module generates the broadcast program list with certain data format with the index information of song audio files, lyrics file and video file simultaneously;
3), adopt the song segmentation algorithm that the song audio files of each first song is cut apart, and generate the playing programs configuration file by the program scheduling administration module;
4) broadcast data server is according to the playing programs profile information, cut apart good each several part song audio files, lyrics file, video file and broadcast program list that all needs wheels are broadcast distribute different transport stream, by different transmission rates, be transferred to cable television digital set-top box through hfc plant by broadcast card;
5) the broadcast program list that top box of digital machine obtains and the buffer memory front end is broadcasted is tabulated according to the index information display program in the broadcast program list; After user's program request song, cable television digital set-top box finds the transport stream that wheel is broadcast first's voice data of this song audio files, this voice data of buffer memory immediately; Meanwhile, search transport stream and the follow-up audio data content of buffer memory that wheel is broadcast other a few part voice datas of this song audio files;
6) behind the voice data of the intact first of buffer memory, set-top box is decoded and is begun audio program and background video program by the hardware decoding chip of itself and plays, and uses captions that the lyrics data file guarantees reality and accompaniment synchronously; Continue the voice data of other several parts of buffer memory simultaneously, up to buffer memory and play complete first song.
7, the player method of the Karaoke VOD system based on unidirectional Cable Network network according to claim 6, it is characterized in that: the lyrics file that on each transport stream, comprises one or more video flowings, a plurality of audio stream and audio stream correspondence in the described step 4), video flowing can combine with a plurality of audio streams and corresponding lyrics file, forms a plurality of different Karaoke programs. The data message that broadcast data server transmits is encrypted after hfc plant is sent on the cable television digital set-top box by conditional receiving device; Whether set-top box detection user is authorized in the described step 5), if be authorized to, then data message is obtained in deciphering.
8, according to the player method of claim 6 or 7 described Karaoke VOD system based on unidirectional Cable Network network, it is characterized in that: after finishing described step 6) and playing complete first song, preengage next song of program request according to the user, cable television digital set-top box begins buffer memory in advance, and next has cut apart the voice data of good song audio files.
9, according to the player method of claim 6 or 7 described Karaoke VOD system based on unidirectional Cable Network network, it is characterized in that: the data format of the song audio files in the described step 5) is Mp1, Mp2 or Mp3.
10, according to the player method of claim 6 or 7 described Karaoke VOD system based on unidirectional Cable Network network, it is characterized in that: the data format of the song audio files of the song tools support input in the described step 1) is CDA, WMA, WAV, RAW, AC3, AVI, MID or DAC.
11, the player method of the Karaoke VOD system based on unidirectional Cable Network network according to claim 6 is characterized in that: cut apart audio file according to following partitioning algorithm in the described step 3):
A. the playback rate of setting audio file is PS, the reproduction time of audio file is PT, total transmission bandwidth of audio file is Bw, total audio file file division piece number is that 2 and every block size are respectively Head, Body, cut apart back Head, the size of the download transmission rate of Body all is Tp, and the size of set-top box buffer memory audio file is CASHE;
B. Theoretical Calculation is according to as follows: the size of audio file is PS*PT, i.e. Head+Body=PS*PT; When the total transmission bandwidth Bw=Tp*2 of audio file, the download time of Head is the shortest; The download time of Head is Head/Tp, and the reproduction time of Head is Head/PS, and the download time of Body is Body/Tp, Head/Tp+Head/PS＞=Body/Tp; Big or small CASHE=Head+ (Head/Tp) the * PS of set-top box buffer memory audio file;
C. preestablish the available minimal cache of the whole network user side " Karaoke "; Utilize the program scheduling administration module of data management dispatch server to draw the playback rate PS of this song audio files and the reproduction time length PT of audio file according to automatic identification of song files; According to the big or small CASHE of set-top box buffer memory audio file, find the solution above-mentioned inequation Head/Tp+Head/PS＞=Body/Tp by exhaust algorithm;
D. calculate: the Tp minimum value that meets the demands, the value of Head, Body, Bw value, the download time of Head;
E. according to result calculated, use redundancy factor suitably to increase Tp and corresponding Bw, cut apart audio file according to result calculated at last and transmit according to Tp.
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| CN 200410026532 CN1564596A (en) | 2004-03-19 | 2004-03-19 | Caraoke on-demand system based on one-way wired digital television network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100401774C (en) * | 2005-11-18 | 2008-07-09 | 浪潮电子信息产业股份有限公司 | Method for realizing large scale digital television video order programme in unidirectional television network |
| CN101763393B (en) * | 2006-07-03 | 2013-06-05 | 爱国者数码科技有限公司 | Method for acquiring network audio files and video files |
| CN103491078A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Multimedia gateway multichannel data access method and multimedia gateway |
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2004
- 2004-03-19 CN CN 200410026532 patent/CN1564596A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401774C (en) * | 2005-11-18 | 2008-07-09 | 浪潮电子信息产业股份有限公司 | Method for realizing large scale digital television video order programme in unidirectional television network |
| CN101763393B (en) * | 2006-07-03 | 2013-06-05 | 爱国者数码科技有限公司 | Method for acquiring network audio files and video files |
| CN103491078A (en) * | 2013-09-11 | 2014-01-01 | 深圳市九洲电器有限公司 | Multimedia gateway multichannel data access method and multimedia gateway |
| CN103491078B (en) * | 2013-09-11 | 2017-04-12 | 深圳市九洲电器有限公司 | Multimedia gateway multichannel data access method and multimedia gateway |
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