CN102088631B

CN102088631B - Live and demand broadcast method of digital television (TV) programs as well as related device and system

Info

Publication number: CN102088631B
Application number: CN 201110033098
Authority: CN
Inventors: 付艳
Original assignee: Shenzhen Coship Electronics Co Ltd
Current assignee: Shenzhen Coship Electronics Co Ltd
Priority date: 2011-01-30
Filing date: 2011-01-30
Publication date: 2013-04-24
Anticipated expiration: 2031-01-30
Also published as: CN102088631A

Abstract

The embodiment of the invention discloses a live and demand broadcast method of digital television (TV) programs as well as a related device and system. The live broadcast method of the digital TV programs comprises the following steps: receiving transport stream (TS) from a transmitting terminal of the digital TV programs via a local playing system; decoding the TS to obtain video information of the digital TV programs and subtitle information matched with the video information which are contained in the TS, wherein, the video information comprises image information or image information and audio information; superimposing the subtitle information on the video information according to a preset subtitle superimposition proportion to obtain the video information containing the subtitle information, wherein, the subtitle superimposition proportion is corresponding to the type of a digital TV terminal to be played; and transcoding the obtained video information containing the subtitle information, and transmitting the transcoded video information to the digital TV terminal. By utilizing the technical scheme provided by the embodiment of the invention, subtitle display flexibility can be improved in the case of playing the digital TV programs, and program playing effect can be enhanced.

Description

Digital television program live and order method and relevant apparatus and system

Technical field

The present invention relates to the digital television techniques field, be specifically related to digital television program player method and relevant apparatus and system.

Background technology

At present, the transmitting terminal of digital television program is normally launched (being that captions are as the part of video) in the corresponding subtitle superposition vision signal when the emission programme signal.The digital television program signal is received by local Play System (such as local Broadcast and TV system) through satellite or Internet communication, and local Play System is play to digital TV terminal after the digital television program signal that receives is carried out corresponding transcoding.

After program is compressed by video code conversion, captions also can dwindle thereupon in proportion, then may not see because compression factor is excessive captions, and this has influence on result of broadcast most probably this moment for the digital TV terminal such as the small screen such as mobile phone or panel computer.For instance, such as the user (such as the old, deafness etc.) for some dysaudias, its dependency degree to captions is higher, when seeing TV play etc., it may be watched in conjunction with corresponding lines captions, if can't see corresponding lines captions clearly, then can be larger have influence on the program result of broadcast.

Summary of the invention

The embodiment of the invention provides digital television program live and order method and relevant apparatus and system, and the flexibility of Subtitle Demonstration promotes the program result of broadcast when playing to improve digital television program.

For solving the problems of the technologies described above, the embodiment of the invention provides following technical scheme:

The embodiment of the invention provides a kind of digital television program live broadcasting method, comprising:

The type of the digital TV terminal of local Play System receiving digital television terminal to report is according to the default subtitle superposition ratio of the type of described digital TV terminal;

Reception is from the transport stream of digital television program transmitting terminal;

The described transport stream of decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information, described video information comprises image information, perhaps, comprises image information and audio-frequency information;

According to default subtitle superposition ratio, described caption information is added on the described video information, obtain to comprise the video information of caption information, wherein, described subtitle superposition ratio is corresponding to the type of digital TV terminal to be played;

The described video information that comprises caption information that obtains is carried out transcoding; Described transcoding comprises the adjustment of format conversion, conversion of resolution, frame per second;

Issue the transport stream that comprises the video information that comprises caption information behind the transcoding to digital TV terminal.

Optionally, described reception comprises from the transport stream of digital television program transmitting terminal: receive the transport stream based on digital broadcasting caption system standard from the digital television program transmitting terminal.

The embodiment of the invention also provides a kind of digital TV program on-demand method, comprising:

The order request that the receiving digital television terminal sends, described order request comprise the first indication information of the digital television program that is used to indicate the request program request; And the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Obtain video information and the supporting caption information of this video information of the indicated program of described the first indication information, described video information comprises image information, perhaps, comprises image information and audio-frequency information;

According to the second indication information subtitle superposition mode default according to the type of digital TV terminal, described caption information is added on the video information, acquisition comprises the video information of caption information, so that described digital TV terminal is play the described video information that comprises caption information;

Local Play System issues the transport stream that comprises the video information that comprises caption information behind the transcoding to described digital TV terminal.

Optionally, the stacked system that indicates of described the second indication information comprises: superposed positions and/or the stack ratio of the supporting subtitle superposition of digital television program to the video of this digital television program.

Optionally, the order request of receiving digital television terminal transmission; Obtain the step of the supporting caption information of the video information of the indicated program of described the first indication information and this video information, comprising:

Order request by local Play System receiving digital television terminal transmission, described order request comprises the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Obtain the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information; Issue to described digital TV terminal and to comprise the described video information obtained and the transport stream of caption information,

Described caption information is added on the video information, obtains to comprise the video information of caption information, so that described digital TV terminal is play the described step that comprises the video information of caption information, comprising:

Receive the transport stream that local Play System issues by described digital TV terminal, this transport stream of decoding obtains the video information and the caption information that comprise in this transport stream; According to the subtitle superposition ratio of setting, described caption information is added on the described video information, obtain to comprise the video information of caption information; Play the video information that comprises caption information that obtains.

Optionally, the type of the supporting captions of digital television program that indicate of described the 3rd indication information comprises: the languages of the supporting captions of digital television program.

The embodiment of the invention also provides a kind of local Play System, comprising:

The first receiver module is used for the type of the digital TV terminal of receiving digital television terminal to report, according to the default subtitle superposition ratio of the type of described digital TV terminal; Be used for receiving the transport stream from the digital television program transmitting terminal;

Decoder module, the described transport stream that is used for decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information, described video information comprises image information, perhaps, comprises image information and audio-frequency information;

The first subtitle superposition module, be used for according to default subtitle superposition ratio, described caption information is added on the described video information, obtain to comprise the video information of caption information, wherein, described subtitle superposition ratio is corresponding to the type of digital TV terminal to be played;

The transcoding module is used for the described video information that comprises caption information that described the first subtitle superposition module obtains is carried out transcoding; Described transcoding comprises the adjustment of format conversion, conversion of resolution, frame per second;

Issue module, be used for issuing the transport stream that comprises the video information that comprises caption information behind the described transcoding module transcoding to digital TV terminal.

The embodiment of the invention also provides another kind of local Play System, comprising:

The second receiver module, be used for the order request that the receiving digital television terminal sends, described order request comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program;

Acquisition module, for the video information and the supporting caption information of this video information that obtain the indicated program of the first indication information, wherein, described video information comprises image information, perhaps, comprises image information and audio-frequency information;

The second subtitle superposition module is used for according to described the second indication information subtitle superposition mode default according to the type of digital TV terminal, and described caption information is added on the described video information, obtains to comprise the video information of caption information;

The transcoding module is used for the described video information that comprises caption information that the second subtitle superposition module obtains is carried out transcoding; Described transcoding comprises the adjustment of format conversion, conversion of resolution, frame per second;

Issue module, be used for issuing the transport stream that comprises the video information that comprises caption information behind the described transcoding module transcoding to described digital TV terminal.

Optionally, the stacked system that described the second indication information indicates comprises: superposed positions and/or the stack ratio of the supporting subtitle superposition of digital television program to the video of this digital television program,

Described the second subtitle superposition module specifically is used for, and according to described the second indication information indicated superposed positions and/or stack ratio, described caption information is added on the described video information, obtains to comprise the video information of caption information.

Therefore, the embodiment of the invention provides in the live scheme of a kind of digital television program, form from the transport stream of digital television program transmitting terminal is, the caption information that the video information of digital television program reaches and this video information is supporting is separate, the subtitle superposition ratio that local Play System can adapt according to the type of digital TV terminal that preset and to be played, caption information in the transport stream is added on the video information, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to digital TV terminal; Because the subtitle superposition ratio adapts with the type of digital TV terminal to be played, the flexibility of Subtitle Demonstration was conducive to promote the digital television program result of broadcast when this had just improved the digital television program broadcast.

Provide in a kind of digital TV program on-demand scheme in the embodiment of the invention, the order request that digital TV terminal sends to local Play System comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Can be by local Play System according to the indicated stacked system of the second indication information, supporting caption information is added on the video information of request program, obtain to comprise the video information of caption information; And issue the video information that this comprises caption information to digital TV terminal; Because the subtitle superposition ratio can adapt with the demand of the digital TV terminal of request program, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.Perhaps, the order request that digital TV terminal sends to local Play System comprises the first indication information of the digital television program that is used to indicate the request program request, and is used to indicate the 3rd indication information of type of the supporting captions of this digital television program of request; Can be obtained by local Play System the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and issue to this digital TV terminal; The transport stream that can be received by digital TV terminal decoding obtains the video information and the caption information that comprise in this transport stream; And according to the subtitle superposition ratio of setting, this caption information is added on the video information, obtain to comprise the video information of caption information and play; Because digital TV terminal can come overlapping text according to the subtitle superposition ratio that adapts with its ability to play, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the below will describe to embodiment the simply introduction of accompanying drawing do of required use, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the schematic flow sheet of a kind of digital television program live broadcasting method of providing of the embodiment of the invention one;

Fig. 2 is a kind of digital television program live broadcast system configuration diagram that the embodiment of the invention two provides;

Fig. 3 is the schematic flow sheet of a kind of digital television program live broadcasting method of providing of the embodiment of the invention two;

Fig. 4 is the schematic flow sheet of a kind of digital TV program on-demand method of providing of the embodiment of the invention three;

Fig. 5 is the schematic flow sheet of a kind of digital TV program on-demand method of providing of the embodiment of the invention four;

Fig. 6 is the schematic flow sheet of a kind of digital TV program on-demand method of providing of the embodiment of the invention five;

Fig. 7 is a kind of local Play System schematic diagram that the embodiment of the invention provides;

Fig. 8 is the another kind of local Play System schematic diagram that the embodiment of the invention provides;

Fig. 9 is another local Play System schematic diagram that the embodiment of the invention provides;

Figure 10 is a kind of digital television system schematic diagram that the embodiment of the invention provides.

Embodiment

The embodiment of the invention provides digital television program live and order method and relevant apparatus and system.

For so that goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, but not whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.

Below be elaborated respectively.

Embodiment one

An embodiment of digital television program live broadcasting method of the present invention comprises: local Play System receives the transport stream (TS, Transport Stream) from the digital television program transmitting terminal; This transport stream of decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information, wherein, can comprise in this video information: image information perhaps, comprises image information and audio-frequency information etc.; According to default subtitle superposition ratio, this caption information is added on the above-mentioned video information, obtain to comprise the video information of caption information, wherein, this subtitle superposition ratio is corresponding to the type of digital TV terminal to be played; This video information that comprises caption information that obtains is carried out transcoding; Issue the transport stream that comprises the video information behind the above-mentioned transcoding to digital TV terminal.

Referring to Fig. 1, concrete steps can comprise:

110, local Play System receives the transport stream from the digital television program transmitting terminal;

Wherein, local Play System (for example local broadcasting and TV Play System) can receiving digital television program launch end by the transport stream of wireless (such as satellite or terrestrial microwave) or cable network transmission, can comprise in this transport stream digital television program video information and with the supporting caption information of this video information, certainly, can comprise in the video information: image information, perhaps, comprise image information and audio-frequency information (in general this audio-frequency information and image information are supporting).

Certainly, the format standard that the transport stream that the digital television program transmitting terminal sends adopts is the form that caption stream is separated with video flowing, as adopting digital broadcasting caption system standard (DVB-SUB, Digital Video Broadcasting-Subtitling) form, perhaps, also can adopt other to separate the form of caption stream and video flowing.

120, the transport stream that receives of local Play System decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information;

Wherein, if also comprise in the transport stream with this video information in the supporting audio-frequency information of image information, then local Play System also can obtain this supporting audio-frequency information by decoding, at this moment, the supporting caption information of this video information can comprise literal corresponding to audio-frequency information in this video information, certainly, the supporting caption information of this video information also can comprise such as other the Word message such as offscreen voice, imagery annotation.

130, local Play System is according to default subtitle superposition ratio, and the caption information that obtains is added on the above-mentioned video information, obtains to comprise the video information of caption information;

Wherein, above-mentioned subtitle superposition ratio is corresponding to the type of digital TV terminal to be played.This digital TV terminal can be the intelligence such as digital TV set-top box, internet protocol TV (IPTV, Internet Protocol Television) terminal, digital TV integrated machine, mobile phone, iPad, computer or non intelligent terminal that can receiving digital television.

In actual applications, local Play System can (for example digital TV terminal can be initiatively or when the local Play System request according to the type of digital TV terminal to be played, report the type of this digital TV terminal to local Play System, local Play System is known the type of this digital TV terminal accordingly) difference, (this subtitle superposition ratio may be the digital TV terminal indication to default different subtitle superposition ratios, perhaps also may be local Play System configures according to the type of digital TV terminal to be played), usually the display screen of digital TV terminal is less, the subtitle superposition ratio is just larger, for example, if digital TV terminal to be played is mobile phone, then default subtitle superposition ratio can be 10:1, and namely the ratio of the size of the size of each word in the captions and video image is 10:1; If digital TV terminal to be played is panel TV, then default subtitle superposition ratio can be 30:1, and namely the ratio of the size of the size of each word in the captions and video image is 30:1, can certainly be other ratio, by that analogy.

Local Play System is according to default subtitle superposition ratio, the caption information that obtains is added on the video information, acquisition comprises the video information of caption information, and at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, before video information that caption information is added to, local Play System also can carry out transcoding to this video information first, on the video information of this transcoding that again caption information is added to behind the transcoding.

140, local Play System carries out transcoding to the video information that comprises caption information that obtains;

Under a kind of application scenarios, in video information that caption information is added to, after acquisition comprises the video information of caption information, local Play System can carry out transcoding (mainly being that image information is wherein carried out transcoding) to this video information that comprises caption information as required, and transcoding comprises adjustment (as can be with per second 30 frame boil down to per seconds 24 frames) of format conversion, conversion of resolution (as with 1920 * 1080 boil down tos 1280 * 720), frame per second etc.

150, local Play System issues the transport stream that comprises the video information behind the transcoding to digital TV terminal.

Further, digital TV terminal can obtain by decoding the video information that comprises caption information in the transport stream, and then can play the video information that this comprises caption information after this transport stream that receives from local Play System.Certainly, if also comprise in this transport stream with this video information in the supporting audio-frequency information of image information, then digital TV terminal also can obtain this supporting audio-frequency information by decoding, and can play synchronously with image information.

Be understandable that, the local Play System of the embodiment of the invention may comprise a plurality of hardware devices (such as comprising signal receiver, apparatus for transmitting signal, decoding device, transcoding equipment etc.), also may be an equipment that has simultaneously signal reception and the functions such as transmission, decoding and transcoding certainly.

Therefore, form from the transport stream of digital television program transmitting terminal in the present embodiment is, the caption information that the video information of digital television program reaches and this video information is supporting is separate, the subtitle superposition ratio that local Play System can adapt according to the type of digital TV terminal that preset and to be played, caption information in the transport stream is added on the video information, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to digital TV terminal; Because the subtitle superposition ratio adapts with the type of digital TV terminal to be played, the flexibility of Subtitle Demonstration was conducive to promote the digital television program result of broadcast when this had just improved the digital television program broadcast.

Embodiment two

For ease of better understanding and implement the technical scheme of the above embodiment of the present invention, a concrete application scenarios is described in detail below by giving an example.Wherein, the digital television program live broadcast system framework in the present embodiment can be as shown in Figure 2, the digital television program transmitting terminal via satellite or the terrestrial transmission mode, to local Play System transmitting digital TV signal.

Referring to Fig. 3, another embodiment of digital television program live broadcasting method of the present invention can comprise:

301, digital television program transmitting terminal emission transport stream;

Wherein, the transport stream that the digital television program transmitting terminal sends by wireless (such as satellite or terrestrial microwave) or cable network, can comprise in this transport stream digital television program video information and with the supporting caption information of this video information, certainly, can comprise in this video information: image information, perhaps, comprise image information and audio-frequency information etc.

Certainly, the format standard that the transport stream that the digital television program transmitting terminal sends adopts is the form that caption stream is separated with video flowing, for example transport stream can adopt the DVB-SUB form, perhaps also can adopt other form that separates caption stream and video flowing, the transport stream that sends take the digital television program transmitting terminal in the present embodiment adopts the DVB-SUB form as example.

302, local Play System receives the transport stream from the digital television program transmitting terminal; The transport stream that receives of decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information;

Wherein, if not only comprise image information in the video information, also comprise supporting audio-frequency information, then local Play System also can obtain this supporting audio-frequency information by decoding, at this moment, the supporting caption information of this video information can comprise the literal that this audio-frequency information is corresponding, and certainly, the supporting caption information of this video information also can comprise such as other the literal such as offscreen voice, note.

303, local Play System is according to default subtitle superposition ratio, and the caption information that obtains is added on the above-mentioned video information, obtains to comprise the video information of caption information;

Wherein, the default subtitle superposition ratio of local Play System is corresponding to the type of digital TV terminal to be played.Digital TV terminal can be the intelligence such as digital TV set-top box, IPTV terminal, digital TV integrated machine, mobile phone, iPad, computer or non intelligent terminal that can receiving digital television.

In actual applications, local Play System can (for example digital TV terminal can be initiatively or when the local Play System request according to the type of digital TV terminal to be played, report the type of this digital TV terminal to local Play System, local Play System is known the type of this digital TV terminal accordingly) difference, (this subtitle superposition ratio may be the digital TV terminal indication to default different subtitle superposition ratios, perhaps also may be local Play System configures according to the type of digital TV terminal to be played), usually the display screen of digital TV terminal is less, the subtitle superposition ratio is just larger, for example, if digital TV terminal to be played is mobile phone, then default subtitle superposition ratio can be 15:1, and namely the ratio of the size of the size of each word in the captions and video image is 15:1; If digital TV terminal to be played is panel TV, then default subtitle superposition ratio can be 45:1, and namely the ratio of the size of the size of each word in the captions and video image is 45:1, can certainly be other ratio, by that analogy.

Local Play System is according to default subtitle superposition ratio, the caption information that obtains is added on the video information, acquisition comprises the video information of caption information, and at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, before video information that caption information is added to, local Play System also can carry out transcoding (it mainly is that image information is wherein carried out transcoding that this video information is carried out transcoding) to this video information first, on the video information of this transcoding that again caption information is added to behind the transcoding.

304, local Play System carries out transcoding to the video information that comprises caption information that obtains;

Under a kind of application scenarios, in video information that caption information is added to, after acquisition comprises the video information of caption information, local Play System can carry out transcoding to this video information that comprises caption information as required, and transcoding comprises adjustment (as can be with per second 30 frame boil down to per seconds 24 frames) of format conversion, conversion of resolution (as with 1920 * 1080 boil down tos 1280 * 720), frame per second etc.

Wherein, decoding and transcoding can be finished by the decoding transcoding equipment in the local Play System.

305, local Play System issues the transport stream that comprises the video information behind the transcoding to digital TV terminal.

Further, if the video information of request program supporting audio-frequency information also, local Play System also can also comprise the audio-frequency information supporting with this video information in this transport stream.

Further, also but the video information behind the recorded broadcast transcoding is (certainly for local Play System, if decoding also obtained with video information in the supporting audio-frequency information of image information, but local Play System recorded broadcast this supporting audio-frequency information also then), in order to follow-up program request use.

306, digital TV terminal by the video information that comprises caption information in the decoding acquisition transport stream, and is play the video information that this comprises caption information after this transport stream that receives from local Play System.

Certainly, if also include in this transport stream with this video information in the supporting audio-frequency information of image information, then digital TV terminal also can obtain this supporting audio-frequency information by decoding, and can play synchronously with image information.

Therefore, form from the transport stream of digital television program transmitting terminal in the present embodiment is, the DVB-SUB form that the caption information that video information reaches and this video information is supporting is separate, the subtitle superposition ratio that local Play System can adapt according to the type of digital TV terminal that preset and to be played, caption information in the transport stream is added on the video information, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to digital TV terminal; Because the subtitle superposition ratio adapts with the type of digital TV terminal to be played, the flexibility of Subtitle Demonstration was conducive to promote the digital television program result of broadcast when this had just improved the digital television program broadcast.

Embodiment three

An embodiment of digital TV program on-demand method of the present invention, comprise: the order request that local Play System receiving digital television terminal sends, this order request comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Obtain video information and the supporting caption information of this video information of the indicated program of the first indication information, wherein, can comprise in this video information: image information perhaps, comprises image information and audio-frequency information etc.; According to the indicated stacked system of the second indication information, this caption information is added on this video information, obtain to comprise the video information of caption information; The video information that comprises caption information that obtains is carried out transcoding; Issue the transport stream that comprises the video information behind the transcoding to above-mentioned digital TV terminal.

Referring to Fig. 4, concrete steps can comprise:

410, the order request of local Play System receiving digital television terminal transmission;

Wherein, this order request can comprise the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program;

In actual applications, the first above-mentioned indication information for example can indicate program identification, address sitation index or the URL(uniform resource locator) (URL, Uniform/Universal Resource Locator) etc. of the digital television program of request program request.The stacked system that the second indication information indicates can comprise: the superposed positions of the supporting subtitle superposition of digital television program to the video of this digital television program (for example indication be added to video under, directly over etc.) and/or stack ratio etc.

Be understandable that, the display screen of digital TV terminal is less, and the subtitle superposition ratio of the second indication information indication is usually just larger.

420, local Play System obtains video information and the supporting caption information of this video information of the indicated program of the first indication information, wherein, can comprise in this video information: image information perhaps, comprises image information and audio-frequency information etc.;

In actual applications, local Play System is independently deposited video information and the supporting caption information of this video information of program, local Play System is according to the first indication information, obtain video information and the supporting caption information of this video information of the indicated program of the first indication information, perhaps, local Play System can obtain from miscellaneous equipment video information and the supporting caption information (certainly this moment, the video information of obtaining and the supporting caption information of this video information are independently) of this video information of the indicated program of the first indication information.

430, local Play System is according to the indicated stacked system of the second indication information, and this caption information is added on this video information, obtains to comprise the video information of caption information;

Wherein, local Play System is according to default subtitle superposition ratio, and the caption information that obtains is added on the video information, obtains to comprise the video information of caption information, at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, before video information that caption information is added to, local Play System also can carry out transcoding to this video information first, on the video information of this transcoding that again caption information is added to behind the transcoding.

440, local Play System carries out transcoding to the video information that comprises caption information that obtains;

450, local Play System issues the transport stream that comprises the video information behind the transcoding to above-mentioned digital TV terminal.

Further, digital TV terminal can obtain by decoding the video information that comprises caption information in the transport stream, and then can play the video information that this comprises caption information after this transport stream that receives from local Play System.Certainly, if also comprise the audio-frequency information supporting with this video information in this transport stream, then digital TV terminal also can obtain this supporting audio-frequency information by decoding, and can play synchronously with video information.

Therefore, the order request that digital TV terminal sends to local Play System in the present embodiment comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Local Play System is according to the indicated stacked system of the second indication information, and supporting caption information is added on the video information of request program, obtains to comprise the video information of caption information; And issue the video information that this comprises caption information to digital TV terminal; Because the demand of the digital TV terminal of subtitle superposition ratio and request program adapts, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Embodiment four

For ease of better understanding and implement the technical scheme of the above embodiment of the present invention, a concrete application scenarios is described in detail below by giving an example.

Referring to Fig. 5, another embodiment of digital TV program on-demand method of the present invention can comprise:

501, local Play System sends program guide to digital TV terminal;

In actual applications, but the digital television program content information that can comprise program request in the program guide that local Play System sends to digital TV terminal, also can comprise type information with the supporting captions of this digital television program etc., the type information can comprise: the languages of supporting captions, font format of captions etc.

502, digital TV terminal is to the order request of local Play System transmission;

In actual applications, the first above-mentioned indication information is such as program identification, allocation index or the URL(uniform resource locator) etc. of the digital television program that can indicate the request program request.The stacked system that the second indication information indicates can comprise: the superposed positions of the supporting subtitle superposition of digital television program to the video of this digital television program (for example indication be added to video under, directly over etc.) and/or stack ratio etc.

For example, the user asks the digital television program of program request to be " large gate ", and the program identification of " large gate " is " large gate PPS001 ", and then the first indication information can comprise " large gate PPS001 ".Order request also can comprise the 3rd indication information of type of the supporting captions of this digital television program of the request of being used to indicate, and the 3rd indication information can be indicated: supporting captions type is Chinese and/or English, and Chinese font is black, and english font be redness.

503, local Play System receives above-mentioned order request; Obtain video information and the supporting caption information of this video information of the indicated program of the first indication information, wherein, can comprise in this video information: image information perhaps, comprises image information and audio-frequency information etc.;

504, local Play System is according to the indicated stacked system of the second indication information, and this caption information is added on this video information, obtains to comprise the video information of caption information;

Wherein, local Play System is according to default subtitle superposition ratio, and the caption information that obtains is added on the video information, obtains to comprise the video information of caption information, at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, if order request also can comprise the 3rd indication information of type of the supporting captions of this digital television program of the request of being used to indicate, then local Play System can select the caption information of the indicated type of the 3rd indication information to superpose.Further, before video information that caption information is added to, local Play System also can carry out transcoding to this video information first, on the video information of this transcoding that again caption information is added to behind the transcoding.

505, local Play System carries out transcoding to the video information that comprises caption information that obtains;

Under a kind of application scenarios, after video information that caption information is added to obtains to comprise the video information of caption information, local Play System can carry out transcoding to this video information that comprises caption information as required, and transcoding can comprise adjustment (as can be with per second 30 frame boil down to per seconds 24 frames) of format conversion, conversion of resolution (as with 1920 * 1080 boil down tos 1280 * 720), frame per second etc.

506, local Play System issues the transport stream that comprises the video information behind the transcoding to digital TV terminal.

507, digital TV terminal by the video information that comprises caption information in the decoding acquisition transport stream, and is play the video information that this comprises caption information after this transport stream that receives from local Play System.

Certainly, if also include in this transport stream with this video information in the supporting audio-frequency information of image information, then digital TV terminal also can obtain this supporting audio-frequency information by decoding, and can play synchronously with video information.

Therefore, the order request that digital TV terminal sends to local Play System in the present embodiment comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Local Play System is according to the indicated stacked system of the second indication information, and supporting caption information is added on the video information of request program, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to digital TV terminal; Because the demand of the digital TV terminal of subtitle superposition ratio and request program adapts, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Embodiment five

Another embodiment of digital TV program on-demand method of the present invention, comprise: the order request that local Play System receiving digital television terminal sends, this order request comprises the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Obtain the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, wherein, can comprise in this video information: image information perhaps, comprises image information and audio-frequency information etc.; Issue to this digital TV terminal and to comprise the video information obtained and the transport stream of caption information; Digital TV terminal receives the transport stream that local Play System issues, and this transport stream of decoding obtains the video information and the caption information that comprise in this transport stream; According to the subtitle superposition ratio of setting, this caption information is added on this video information, obtain to comprise the video information of caption information; Play the video information that comprises caption information that obtains.

Referring to Fig. 6, one concrete steps under the application scenarios for example, can comprise:

601, local Play System sends program guide to digital TV terminal;

In actual applications, but the digital television program content information that can comprise program request in the program guide that local Play System sends to digital TV terminal, also can comprise type information with the supporting captions of this digital television program etc., the type information can comprise: languages of supporting captions (this moment, character library was configurable on terminal, and font format is determined by terminal) etc.

602, digital TV terminal is to the order request of local Play System transmission;

Wherein, this order request can comprise the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request;

In actual applications, the first above-mentioned indication information is such as program identification, allocation index or the URL(uniform resource locator) etc. of the digital television program that can indicate the request program request.The type of the supporting captions of digital television program that the 3rd indication information can indicate comprises: the languages of the supporting captions of digital television program, the font format of captions etc.

For example, the user asks the digital television program of program request to be " The Romance of the Three Kingdoms ", and the program identification of " The Romance of the Three Kingdoms " is " The Romance of the Three Kingdoms PPS0105 ", and the first indication information can comprise " The Romance of the Three Kingdoms PPS0105 ".The 3rd indication information can be indicated: supporting captions type is Chinese and English.

603, the order request of local Play System receiving digital television terminal transmission, obtain the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, wherein, can comprise in this video information: image information, perhaps, comprise image information and audio-frequency information etc.;

In actual applications, local Play System is independently deposited video information and the supporting caption information of this video information of program, and local Play System obtains the video information of the indicated program of the first indication information according to the first indication information; According to the 3rd indication information, obtain the indicated type of the 3rd indication information with the supporting caption information of this video information, perhaps, local Play System can obtain from miscellaneous equipment the caption information (certainly this moment, the video information of obtaining and the supporting caption information of this video information are independently) of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information.

604, local Play System issues to this digital TV terminal and comprises the video information obtained and the transport stream of caption information; Wherein, video information and caption information are separate in this transport stream, are not superimposed.

Under a kind of application scenarios, local Play System can carry out transcoding with the video information of obtaining first, and transcoding can comprise adjustment (as can be with per second 30 frame boil down to per seconds 24 frames) of format conversion, conversion of resolution (as with 1920 * 1080 boil down tos 1280 * 720), frame per second etc.And issue to this digital TV terminal and to comprise the caption information that obtains and the transport stream of transcoding rear video information, can alleviate like this processing load of digital TV terminal.

605, digital TV terminal receives the transport stream that local Play System issues, and this transport stream of decoding obtains the video information and the caption information that comprise in this transport stream;

Wherein, if also comprise the supporting audio-frequency information of image information in this video information in the transport stream, then digital TV terminal also can obtain this supporting audio-frequency information by decoding.

606, digital TV terminal is according to the subtitle superposition ratio of setting, and this caption information is added on the above-mentioned video information, obtains to comprise the video information of caption information;

Wherein, the subtitle superposition ratio of above-mentioned setting can have the user to set, and perhaps has digital TV terminal automatically to generate according to its broadcast performance.For example, if this digital TV terminal is mobile phone, then default subtitle superposition ratio can be 14:1; If digital TV terminal to be played is the IPTV terminal, then default subtitle superposition ratio can be 25:1, can certainly be other ratio, by that analogy.

607, digital TV terminal is play the video information that comprises caption information that obtains.

Certainly, if also include in this transport stream with this video information in the supporting audio-frequency information of image information, then digital TV terminal can obtain this supporting audio-frequency information by decoding, and can play synchronously with video information.

Therefore, the order request that digital TV terminal sends to local Play System in the present embodiment comprises the first indication information of the digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Local Play System obtains the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and issues to this digital TV terminal; The transport stream that the digital TV terminal decoding receives obtains the video information and the caption information that comprise in this transport stream; And can be according to the subtitle superposition ratio of setting, this caption information is added on the video information, obtain to comprise the video information of caption information and play; Because digital TV terminal can come overlapping text according to the subtitle superposition ratio that adapts with its ability to play, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Another embodiment of digital TV program on-demand method of the present invention comprises: the order request that the receiving digital television terminal sends, above-mentioned order request comprise the first indication information of the digital television program that is used to indicate the request program request; Obtain video information and the supporting caption information of this video information of the indicated program of above-mentioned the first indication information, above-mentioned video information comprises image information, perhaps, comprises image information and audio-frequency information; Above-mentioned caption information is added on the video information, obtains to comprise the video information of caption information, so that above-mentioned digital TV terminal is play the above-mentioned video information that comprises caption information.

Under a kind of application scenarios, can be by the order request of local Play System (perhaps third party device) receiving digital television terminal transmission, this order request comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Obtain video information and the supporting caption information of this video information of the indicated program of the first indication information, change video information and comprise image information, or, comprise image information and audio-frequency information; According to the indicated stacked system of the second indication information, this caption information is added on this video information, obtain to comprise the video information of caption information; This video information that comprises caption information that obtains is carried out transcoding: local Play System issues the transport stream that comprises the video information behind the transcoding to this digital TV terminal.

Perhaps, also can be by the order request of local Play System (perhaps third party device) receiving digital television terminal transmission, this order request comprises the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Obtain the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information; Issue to above-mentioned digital TV terminal and to comprise the above-mentioned video information obtained and the transport stream of caption information.Can receive the transport stream that local Play System issues by this digital TV terminal, this transport stream of decoding obtains the video information and the caption information that comprise in this transport stream; According to the subtitle superposition ratio of setting, this caption information is added on the above-mentioned video information, obtain to comprise the video information of caption information; Play the video information that comprises caption information that obtains.

That is to say, in actual applications, can be carried out by digital TV terminal, local Play System or third party device the step of overlapping text information and video information.

For ease of better implementing the technique scheme of the embodiment of the invention, also be provided for implementing relevant apparatus and the system of technique scheme among the following embodiment of the present invention.

A kind of local Play System 700 referring to Fig. 7, the embodiment of the invention provide comprises:

The first receiver module 710, decoder module 720, the first subtitle superposition module 730, transcoding module 740 and issue module 750.

Wherein, the first receiver module 710 is used for receiving the transport stream from the digital television program transmitting terminal;

Wherein, the transport stream that the first receiver module 710 can receiving digital television program launch end sends by wireless (such as satellite or terrestrial microwave) or cable network, can comprise in this transport stream digital television program video information and with the supporting caption information of this video information, certainly, this video information can comprise image information, perhaps, comprise image information and audio-frequency information etc.

Certainly, the format standard that the transport stream that the digital television program transmitting terminal sends adopts is the form that caption stream is separated with video flowing, and for example transport stream can adopt the DVB-SUB form, perhaps also can adopt other to separate the form of caption stream and video flowing.

Decoder module 720 is used for the transport stream that decoding the first receiver module 710 receives, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information;

Wherein, if also comprise in the transport stream with this video information in the supporting audio-frequency information of image information, then decoder module 720 also can obtain this supporting audio-frequency information by decoding, at this moment, the supporting caption information of this video information can comprise the literal that this supporting audio-frequency information is corresponding, certainly, the supporting caption information of this video information also can comprise such as other the literal such as offscreen voice, note.

The first subtitle superposition module 730, be used for according to default subtitle superposition ratio, the caption information that decoder module 720 is obtained is added on the video information, obtains to comprise the video information of caption information, wherein, this subtitle superposition ratio is corresponding to the type of digital TV terminal to be played;

In actual applications, the first subtitle superposition module 730 can (for example digital TV terminal can be initiatively or when the local Play System request according to the type of digital TV terminal to be played, report the type of this digital TV terminal to local Play System, local Play System is known the type of this digital TV terminal accordingly) difference, (this subtitle superposition ratio may be that digital TV terminal is indicated to default different subtitle superposition ratio, perhaps also may be local Play System configures automatically according to the type of digital TV terminal to be played), usually the display screen of digital TV terminal is less, the subtitle superposition ratio is just larger, for example, if digital TV terminal to be played is mobile phone, then default subtitle superposition ratio can be 12:1; If digital TV terminal to be played is panel TV, then default subtitle superposition ratio can be 33:1, can certainly be other ratio, by that analogy.

The first subtitle superposition module 730 is according to default subtitle superposition ratio, the caption information that obtains is added on the video information, acquisition comprises the video information of caption information, and at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, before video information that caption information is added to, transcoding module 740 also can be carried out transcoding to this video information first, and the first subtitle superposition module 730 is added to caption information on the video information of this transcoding again behind the transcoding.

Transcoding module 740 is used for the video information that comprises caption information that the first subtitle superposition module 730 obtains is carried out transcoding;

Under a kind of application scenarios, in video information that caption information is added to, after acquisition comprises the video information of caption information, transcoding module 740 can be as required, this video information that comprises caption information is carried out transcoding, and transcoding comprises adjustment (as can be with per second 30 frame boil down to per seconds 25 frames) of format conversion, conversion of resolution (as with 1920 * 1080 boil down tos 1280 * 720), frame per second etc.

Issue module 750, be used for issuing the transport stream that comprises the video information behind transcoding module 740 transcodings to digital TV terminal.

Further, if image information is also supporting in the video information of request program audio-frequency information arranged, issue module 750 and also can in this transport stream, also comprise the audio-frequency information supporting with this.

Further, local Play System 700 also can comprise the recorded broadcast module, be used for behind the recorded broadcast transcoding video information (certainly, if also obtained with video information in the supporting audio-frequency information of image information, but local Play System this supporting audio-frequency information of recorded broadcast also then), use in order to follow-up program request.

Be understandable that, the local Play System 700 of the present embodiment may comprise a plurality of hardware devices, also may be an equipment that has simultaneously signal reception and the functions such as transmission, decoding and transcoding certainly.

Be appreciated that, the local Play System 700 of the present embodiment can be such as the local Play System among above-mentioned embodiment of the method one or two, it can be used for cooperating whole technical schemes of implementation method embodiment, the function of its each functional module can be according to the method specific implementation among the said method embodiment, its specific implementation process can with reference to the associated description in above-described embodiment, repeat no more herein.

Therefore, form from the transport stream of digital television program transmitting terminal in the present embodiment is, the caption information that the video information of digital television program reaches and this video information is supporting is separate, the subtitle superposition ratio that local Play System 700 can adapt according to the type of digital TV terminal that preset and to be played, caption information in the transport stream is added on the video information, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to above-mentioned digital TV terminal; Because the subtitle superposition ratio adapts with the type of digital TV terminal to be played, the flexibility of Subtitle Demonstration was conducive to promote the digital television program result of broadcast when this had just improved the digital television program broadcast.

Another kind of local Play System 800 referring to Fig. 8, the embodiment of the invention provide comprises:

The second receiver module 810, acquisition module 820, the second subtitle superposition module 830, transcoding module 840 and issue module 850.

Wherein, the second receiver module 810, be used for the order request that the receiving digital television terminal sends, this order request comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program;

Acquisition module 820, for the video information and the supporting caption information of this video information that obtain the indicated program of the first indication information, wherein, this video information can comprise image information, perhaps, comprises image information and audio-frequency information etc.;

In actual applications, local Play System is independently deposited video information and the supporting caption information of this video information of program, acquisition module 820 is according to the first indication information, obtain video information and the supporting caption information of this video information of the indicated program of the first indication information, perhaps, acquisition module 820 can obtain from miscellaneous equipment video information and the supporting caption information (certainly this moment, the video information of obtaining and the supporting caption information of this video information are independently) of this video information of the indicated program of the first indication information.

The second subtitle superposition module 830 is used for according to the indicated stacked system of the second indication information, and the caption information that acquisition module 820 is obtained is added on the video information, obtains to comprise the video information of caption information;

Wherein, the second subtitle superposition module 830 is according to default subtitle superposition ratio, the caption information that obtains is added on the video information, acquisition comprises the video information of caption information, at this moment, the size of caption in the video information that comprises caption information of acquisition is to be fit to corresponding digital TV terminal play.Further, before the second subtitle superposition module 830 is added to caption information video information, transcoding module 840 also can be carried out transcoding to this video information first, and the second subtitle superposition module 830 is added to caption information on the video information of this transcoding again behind the transcoding.

Transcoding module 840 is used for the video information that comprises caption information that the second subtitle superposition module 830 obtains is carried out transcoding;

Under a kind of application scenarios, in video information that caption information is added to, after acquisition comprised the video information of caption information, transcoding module 840 can be carried out transcoding to this video information that comprises caption information as required, and transcoding can comprise adjustment of format conversion, conversion of resolution, frame per second etc.

Issue module 850, be used for issuing the transport stream that comprises the video information behind transcoding module 840 transcodings to digital TV terminal.

Further, if the image information of the video information of request program is also supporting audio-frequency information arranged, issue module 850 and also can in this transport stream, also comprise the audio-frequency information supporting with this.

Under a kind of application scenarios, if the stacked system that the second indication information indicates comprises: superposed positions and/or the stack ratio of the supporting subtitle superposition of digital television program to the video of this digital television program.

The second subtitle superposition module 830 can specifically be used for, and according to the second indication information indicated superposed positions and/or stack ratio, the caption information that acquisition module 820 is obtained is added on the video information, obtains to comprise the video information of caption information.

Be appreciated that, the local Play System 800 of the present embodiment can be such as the local Play System among above-mentioned embodiment of the method three or four, it can be used for cooperating whole technical schemes of implementation method embodiment, the function of its each functional module can be according to the method specific implementation among the said method embodiment, its specific implementation process can with reference to the associated description in above-described embodiment, repeat no more herein.

Therefore, digital TV terminal comprises the first indication information of the digital television program that is used to indicate the request program request to the order request that local Play System 800 sends in the present embodiment, and is used to indicate the second indication information of the stacked system of the supporting captions of this digital television program; Local Play System 800 is according to the indicated stacked system of the second indication information, and supporting caption information is added on the video information of request program, obtains to comprise the video information of caption information; And issue the video information that this comprises caption information to digital TV terminal; Because the demand of the digital TV terminal of subtitle superposition ratio and request program adapts, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Another kind of local Play System 900 referring to Fig. 9, the embodiment of the invention provide can comprise:

The 3rd receiver module 910, be used for the order request that the receiving digital television terminal sends, this order request comprises the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request;

In actual applications, the first above-mentioned indication information is such as program identification, allocation index or the URL(uniform resource locator) etc. of the digital television program that can indicate the request program request.The type of the supporting captions of digital television program that the 3rd indication information can indicate comprises: the languages of the supporting captions of digital television program.

The second acquisition module 920 obtains the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and wherein, this video information can comprise image information, perhaps, comprises image information and audio-frequency information etc.;

In actual applications, local Play System 900 is independently deposited video information and the supporting caption information of this video information of program, and the second acquisition module 920 obtains the video information of the indicated program of the first indication information according to the first indication information; According to the 3rd indication information, obtain the indicated type of the 3rd indication information with the supporting caption information of this video information, perhaps, the second acquisition module 920 can obtain from miscellaneous equipment the caption information (certainly this moment, the video information of obtaining and the supporting caption information of this video information are independently) of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information.

Issue module 930, be used for issuing to digital TV terminal and comprise video information that the second acquisition module 920 obtains and the transport stream of caption information.

Under a kind of application scenarios, local Play System 900 also can comprise the transcoding module, is used for the video information that the second acquisition module 920 obtains is carried out transcoding, and transcoding can comprise adjustment of format conversion, conversion of resolution, frame per second etc.

Wherein, if also comprise the supporting audio-frequency information of image information in this video information in the transport stream, issue module 930 and also can in this transport stream, also comprise the audio-frequency information supporting with this.

Be appreciated that, the local Play System 900 of the present embodiment can be such as the local Play System in the above-mentioned embodiment of the method five, it can be used for cooperating whole technical schemes of implementation method embodiment, the function of its each functional module can be according to the method specific implementation among the said method embodiment, its specific implementation process can with reference to the associated description in above-described embodiment, repeat no more herein.

Therefore, the order request that digital TV terminal sends to local Play System 900 in the present embodiment comprises the first indication information of the digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Local Play System 900 obtains the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and issues to this digital TV terminal; So that the transport stream that the digital TV terminal decoding receives obtains the video information and the caption information that comprise in this transport stream; According to the subtitle superposition ratio of setting, this caption information is added on the video information, obtain to comprise the video information of caption information and play; Because digital TV terminal can come overlapping text according to the subtitle superposition ratio that adapts with its ability to play, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Digital television system referring to Figure 10, the embodiment of the invention provide can comprise: local Play System 1010 and digital TV terminal 1020.

Local Play System 1010, be used for the order request that receiving digital television terminal 1020 sends, this order request comprises the first indication information of digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Obtain the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, wherein, this video information can comprise image information, perhaps, comprises image information and audio-frequency information etc.; Issue to digital TV terminal 1020 and to comprise the video information obtained and the transport stream of caption information;

In actual applications, the first above-mentioned indication information is such as program identification, allocation index or the URL(uniform resource locator) etc. of the digital television program that can indicate the request program request.The type of the supporting captions of digital television program that the 3rd indication information can indicate comprises: the languages of the supporting captions of digital television program etc.

Under a kind of application scenarios, the video information that local Play System 1010 can first transcoding obtains, transcoding can comprise adjustment of format conversion, conversion of resolution, frame per second etc.And issue to this digital TV terminal 1020 and to comprise the caption information that obtains and the transport stream of transcoding rear video information, can alleviate like this processing load of digital TV terminal 1020.

Digital TV terminal 1020 is used for receiving the transport stream that local Play System 1010 issues, this transport stream that decoding receives, the video information that obtains comprising in the transport stream and caption information; According to the subtitle superposition ratio of setting, the caption information that obtains is added on the video information, obtain to comprise the video information of caption information; Play the video information that comprises caption information that obtains.

Certainly, if also include in this transport stream with this video information in the supporting audio-frequency information of image information, then digital TV terminal 1020 can obtain this supporting audio-frequency information by decoding, and can play synchronously with image information.

Be understandable that, the local Play System 1010 of the present embodiment may comprise a plurality of hardware devices (such as comprising signal receiver, apparatus for transmitting signal, decoding device, transcoding equipment etc.), also may be an equipment that has simultaneously signal reception and the functions such as transmission, decoding and transcoding certainly.

Therefore, the order request that digital TV terminal 1020 sends to local Play System 1010 in the present embodiment comprises the first indication information of the digital television program that is used to indicate the request program request, and the 3rd indication information of type that is used to indicate the supporting captions of this digital television program of request; Local Play System 1010 obtains the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and issues to this digital TV terminal; The transport stream that digital TV terminal 1020 decodings receive obtains the video information and the caption information that comprise in this transport stream; According to the subtitle superposition ratio of setting, this caption information is added on the video information, obtain to comprise the video information of caption information and play; Because digital TV terminal 1020 can come overlapping text according to the subtitle superposition ratio that adapts with its ability to play, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

Need to prove, for aforesaid each embodiment of the method, for simple description, therefore it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can be referring to the associated description of other embodiment.

To sum up, the embodiment of the invention provides in the live scheme of a kind of digital television program, form from the transport stream of digital television program transmitting terminal is, the caption information that the video information of digital television program reaches and this video information is supporting is separate, the subtitle superposition ratio that local Play System can adapt according to the type of digital TV terminal that preset and to be played, caption information in the transport stream is added on the video information, obtains to comprise the video information of caption information; And issue the video information that comprises these captions to digital TV terminal; Because the subtitle superposition ratio adapts with the type of digital TV terminal to be played, the flexibility of Subtitle Demonstration was conducive to promote the digital television program result of broadcast when this had just improved the digital television program broadcast.

The embodiment of the invention provides in a kind of digital TV program on-demand scheme, the order request that digital TV terminal sends to local Play System comprises the first indication information of the digital television program that is used to indicate the request program request, and the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program; Local Play System is according to the indicated stacked system of the second indication information, and supporting caption information is added on the video information of request program, obtains to comprise the video information of caption information; And issue the video information that this comprises caption information to digital TV terminal; Because the subtitle superposition ratio can adapt with the demand of the digital TV terminal of request program, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

The embodiment of the invention provides in the another kind of digital TV program on-demand scheme, the order request that digital TV terminal sends to local Play System comprises the first indication information of the digital television program that is used to indicate the request program request, and is used to indicate the 3rd indication information of type of the supporting captions of this digital television program of request; Local Play System obtains the caption information of video information and the indicated type of the 3rd indication information of the indicated program of the first indication information, and issues to this digital TV terminal; The transport stream that the digital TV terminal decoding receives obtains the video information and the caption information that comprise in this transport stream; And according to the subtitle superposition ratio of setting, this caption information is added on the video information, obtain to comprise the video information of caption information and play; Because digital TV terminal can come overlapping text according to the subtitle superposition ratio that adapts with its ability to play, the flexibility that this has just improved Subtitle Demonstration when digital television program is play is conducive to promote the digital television program result of broadcast.

One of ordinary skill in the art will appreciate that all or part of step in the whole bag of tricks of above-described embodiment is to come the relevant hardware of instruction finish by program, this program can be stored in the computer-readable recording medium, and storage medium can comprise: read-only memory, random asccess memory, disk or CD etc.

Live and the order method of the above digital television program that the embodiment of the invention is provided and relevant apparatus and system are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to sum up, this description should not be construed as limitation of the present invention.

Claims

1. a digital television program live broadcasting method is characterized in that, comprising:

The described transport stream of decoding, obtain the digital television program that comprises in this transport stream video information and with the supporting caption information of this video information, described video information comprises image information, perhaps, comprises image information and audio-frequency information; According to default subtitle superposition ratio, described caption information is added on the described video information, obtain to comprise the video information of caption information, wherein, described subtitle superposition ratio is corresponding to the type of digital TV terminal to be played;

2. method according to claim 1 is characterized in that,

Described reception comprises from the transport stream of digital television program transmitting terminal:

Reception is from the transport stream based on digital broadcasting caption system standard of digital television program transmitting terminal.

3. a digital TV program on-demand method is characterized in that, comprising:

The order request that the receiving digital television terminal sends, described order request comprise the first indication information of the digital television program that is used to indicate the request program request; And the second indication information that is used to indicate the stacked system of the supporting captions of this digital television program;

Obtain video information and the supporting caption information of this video information of the indicated program of described the first indication information, described video information comprises image information, perhaps, comprises image information and audio-frequency information;

According to the second indication information subtitle superposition mode default according to the type of digital TV terminal, described caption information is added on the video information, acquisition comprises the video information of caption information, so that described digital TV terminal is play the described video information that comprises caption information; The described video information that comprises caption information that obtains is carried out transcoding; Described transcoding comprises the adjustment of format conversion, conversion of resolution, frame per second;

4. method according to claim 3 is characterized in that,

The stacked system that described the second indication information indicates comprises: superposed positions and/or the stack ratio of the supporting subtitle superposition of digital television program to the video of this digital television program.

5. method according to claim 3 is characterized in that, the order request that the receiving digital television terminal sends; Obtain the step of the supporting caption information of the video information of the indicated program of described the first indication information and this video information, comprising:

6. method according to claim 5 is characterized in that,

The type of the supporting captions of digital television program that described the 3rd indication information indicates comprises: the languages of the supporting captions of digital television program.

7. a local Play System is characterized in that, comprising:

8. a local Play System is characterized in that, comprising:

9. local Play System according to claim 8 is characterized in that, the stacked system that described the second indication information indicates comprises: superposed positions and/or the stack ratio of the supporting subtitle superposition of digital television program to the video of this digital television program,