CN100589572C - A kind of terminal and quick preview mobile TV channel method thereof - Google Patents
A kind of terminal and quick preview mobile TV channel method thereof Download PDFInfo
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- CN100589572C CN100589572C CN200810096989A CN200810096989A CN100589572C CN 100589572 C CN100589572 C CN 100589572C CN 200810096989 A CN200810096989 A CN 200810096989A CN 200810096989 A CN200810096989 A CN 200810096989A CN 100589572 C CN100589572 C CN 100589572C
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Abstract
The present invention relates to a kind of terminal and quick preview mobile TV channel method thereof, wherein method comprises: front end is distinguished key images frame and the normal image frame in each channel input code flow and is identified in the picture frame of output code flow; User side receive in all channels output code flow but according to the key images frame in the described sign buffer memory output code flow; User side is selected the described key images frame of a concrete channel of dynamic play according to the user, and described terminal adopts described method.This method only keeps the key frame images of each channel as preview image, the buffering area that makes terminal receive each channel reduces, and prepares the time decreased of code stream, thereby the user reduces the switching channels stand-by period when preview, improve user experience, strengthen the mobile TV usability.
Description
Technical field
The present invention relates to portable terminal and application, be specifically related to a kind of terminal and quick preview mobile TV channel method thereof.
Background technology
Mobile TV, will become we live " the 3rd video screen " after the relay television, computer.Wherein broadcast type mobile phone television is thought the most practical selection.In recent years, digital mobile multimedia broadcasting technology and standard evolution are rapid, " T-DMB " standard of Korea S---ground digital multimedia broadcast system (Terrestrial Digital Multimedia Broadcasting) for example, " DVB-H " standard in Europe---digital video broadcast-handheld formula receives (Digital Video Broadcast Handheld), QualCom " MediaFLO " standard---the single forward link of medium (Media Forward Link Only), and present " CMMB "---the Mobile Multimedia Broadcasting standard (China Mobile MultimediaBroadcasting) of China.
Mobile Multimedia Broadcasting is for reducing power consumption of terminal, and adopt the timeslice burst mode to send MBMS service: each business independently transmits in the timeslice at one.For example: the duration of the broadcast channel frame of CMMB Mobile Multimedia Broadcasting is 1 second, is made up of 40 25 milliseconds of time slots, and one or more time slots can carry the channel data of one road broadcasting multiplex frame encapsulation.
The user browses channel program roughly dual mode.A kind of mode is at present more common: need terminal to switch between each channel time slot of living in one by one to realize that channel switches function of browse.During switching channels, the code stream of closing current channel time slot of living in receives, and changes under the time slot of new channel place, receives code stream again.Regular hour can be expended like this, and terminal to cushion enough data and decoding just can show the channel current playing program.User's a plurality of programs of preview one by one need considerable time like this.The second way is the code stream that terminal receives multi-slot, can play-over the program under any time slot that buffer memory is good when previewing program.But it is very big that this mode requires terminal buffers, a series of processing such as will wait for one by one synchronously to the code stream that receives, and the time of terminal wait needs quite long.Terminal is equivalent to several times even tens times of normal condition one programs at the code stream of instantaneous reception, also will face problems such as code stream block up, obstruction.
In Mobile Multimedia Broadcasting, buffer time greatly not only means the many of storage resources needs, means that also professional acquisition time is long, and channel is long switching time, and user's experience is just poor like this, reduces the user and uses interest.
Summary of the invention
The technical issues that need to address of the present invention are how terminal and quick preview mobile TV channel method thereof are provided, and can make the user with quick previewing program of minimum time.
Above-mentioned first technical problem of the present invention solves like this, and a kind of quick preview mobile TV channel method is provided, and may further comprise the steps:
1.1) front end distinguishes video key images frame and the normal image frame in each channel input code flow and identify in the picture frame of output code flow;
1.2) user side receive in all channels output code flow but according to the key images frame in the described output code flow of a described sign buffer memory;
1.3) select the described key images frame of a concrete channel of dynamic play according to the user.
According to method provided by the invention, described sign is a frame type.
According to method provided by the invention, the frame type of described key images frame is the I frame.
According to method provided by the invention, described frame type is encapsulated in the described output code flow.
According to method provided by the invention, described input code flow comprises the input video stream that contains all picture frames; Described input code flow also comprises input audio stream and input traffic.
According to method provided by the invention, described input video stream, input audio stream and input traffic are independently code stream or composite bit stream separately.
According to method provided by the invention, described input code flow includes, but are not limited to adopt the code stream of realtime transmission protocol RTP transmission means.
According to method provided by the invention, described input code flow includes, but are not limited to the transport stream TS system flow.
According to method provided by the invention, described front end comprises the mobile multimedia headend equipment; Described user side is a mobile multi-media terminal equipment.
Above-mentioned another technical problem of the present invention solves like this, and a kind of mobile multi-media terminal is provided, and this terminal is carried out the television channel preview like this: receive all videos stream but the key frame images that only keeps each channel as preview image.
A kind of terminal provided by the invention and quick preview mobile TV channel method thereof, the key frame images that only keeps each channel is as preview image, the buffering area that can make terminal receive each channel like this reduces, prepare the time decreased of code stream, thereby the user reduces the switching channels stand-by period when preview, improve user experience, strengthen the mobile TV usability.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is the schematic flow sheet that the present invention passes through the key frame preview channel.
Embodiment
At first, brief description thinking of the present invention:
(1) by the mobile multimedia headend equipment with the picture frame type package of video unit in the Mobile Multimedia Broadcasting code stream, when terminal receives, the video frame image of encapsulation is judged, the key frame images that only keeps each channel is as preview image, reduce terminal buffers, improve the speed of previewing program.
When (two) the quick preview of startup was professional, terminal received a plurality of time slot programs under the specific frequency, handles under terminal player then, and each code stream is judged, only keeps key images and enters buffer memory.This method will reduce the buffer memory that terminal receives, and reduce the buffer time that causes because of the reception code stream because of terminal, thereby reduce the switching time that each channel of preview needs.The user cushions the broadcast situation of checking TV programme through the minimum time, and the user can find own favorite program rapidly then, selects fast to watch, improves user experience.
In second step,, further specify front end code stream encapsulation of the present invention and two processes of terminal judges storage at the video data characteristics of Mobile Multimedia Broadcasting code stream:
(1) headend equipment carries out the code stream encapsulation
For the mobile multimedia headend equipment, the code stream of stream input is the Media Stream that comprises video, audio code stream.Video in the Media Stream, audio frequency can be the code streams independently separately of RTP transmission means, also can be the such composite bit streams of TS system flow.
The mobile multimedia headend equipment encapsulates inlet flow, and the field that identifies each picture frame frame type in the video flowing is encapsulated in the Mobile Multimedia Broadcasting code stream.In the Mobile Multimedia Broadcasting code stream, just comprised the identification field of sign video image frame type like this.
(2) terminal receives and judges and storage
Terminal receives judgement and is divided into two steps
1, Mobile Multimedia Broadcasting is for reducing power consumption of terminal, adopt the timeslice burst mode to send MBMS service: a kind of business is in a little timeslice, the whole bandwidth that take system are separately come high-speed transferring data, and the back is then transmitted a kind of business down again, and the like.In terminal, open preview function, chip for cell phone all receives into a plurality of time slot services under the specific frequency.
2, after terminal chip all receives into the business of a plurality of time slots under the specific frequency, terminal player will be judged these data.The front is mentioned, and when Mobile Multimedia Broadcasting is carried out data encapsulation, the picture frame type designation of video unit is encapsulated.The video unit picture frame flag bit that terminal player extracts in the data is judged, if the I frame then keeps this image, if other frame types then abandon this video unit.
Like this, each program per second data only is made up of a width of cloth key frame images, and data volume is reduced in a large number.
Terminal player adds relevant parameter with the key frame images that remains, and remains to the buffer zone, plays in order to decoding.When the user selected preview professional, terminal was extracted the key frame images data in the buffer memory, and the relevant parameter of Video Decoder is set, and showed in terminal with certain particular form.Key frame images changes in time, real-time update.
At last, be elaborated in conjunction with the application of the present invention on CMMB:
On the headend equipment multiplexer, the code stream of importing with stream is that RTP is an example.Wherein video RTP wraps in the transmission, and the video frame images type identification can transmit as payload Payload.In step 1, multiplexer is converted to the CMMB code stream with rtp streaming, and the code stream after the conversion is together with the data such as sign position of picture frame frame type, and encapsulation is advanced in the CMMB multiplexed sub frame respective field.
CMMB was divided into 40 time slots with 1 second time.
Sending n program channel with the CMMB headend equipment is example.In the step 2, start preview function.Behind this function on, the data of 40 time slots of terminal chip under can the specific frequency of receiving terminal promptly can receive the CMMB program stream of n program channel.
Chip receives data, and terminal player software is judged.The information of each video unit in the video-frequency band in each the road CMMB multiplexed sub frame stream in n the program channel is comprised that parameters such as video unit length, picture frame type read, and judge picture frame type wherein.If the I frame, then the key frame images with correspondence remains to the player buffer zone; If other frame types as the P frame, then directly abandon video unit.
The mobile multi-media terminal buffer area only keeps the key frame images of n the program in the up-to-date moment, and according to key frame duration (for example key frame images of 1s) real-time update.When the user watches by the decoding terminals broadcast, watch the key images of current real-time broadcast, 1s changes piece image.When changing channel, only need decode the again key frame images of another channel of terminal is play and is got final product.
Claims (10)
1, a kind of quick preview mobile TV channel method is characterized in that, may further comprise the steps:
1.1) front end distinguishes key images frame and the normal image frame in each channel input code flow and identify in the picture frame of output code flow;
1.2) starting quick preview when professional, terminal receives the output code flow in all channels, and each output code flow is judged, and the key frame images that only keeps each channel is as preview image, and according to key frame duration real-time update;
1.3) select the described key images frame of a concrete channel of dynamic play according to the user, terminal is again and the key frame images of another channel of decoding when changing channel.
According to the described method of claim 1, it is characterized in that 2, described sign is a frame type.
According to the described method of claim 2, it is characterized in that 3, the frame type of described key images frame is the I frame.
According to the described method of claim 2, it is characterized in that 4, described frame type is encapsulated in the described output code flow.
According to the described method of claim 1, it is characterized in that 5, described input code flow comprises and contains all input video streams of picture frame; Described input code flow also comprises input audio stream and input traffic.
According to the described method of claim 5, it is characterized in that 6, described input video stream, input audio stream and input traffic are independently code stream or composite bit stream separately.
According to claim 6 described methods, it is characterized in that 7, described independently code stream is the code stream that adopts the RTP transmission means.
According to the described method of claim 6, it is characterized in that 8, described composite bit stream is the TS system flow.
According to the described method of claim 1, it is characterized in that 9, described front end comprises the mobile multimedia headend equipment; Described user side is a mobile multi-media terminal equipment.
10, a kind of mobile multi-media terminal is characterized in that, described terminal comprises:
Be used for when the quick preview of startup is professional, receiving the output code flow unit in all channels;
Be used for unit that each output code flow is judged;
Be used for only keeping the unit of the key frame images of each channel as preview image;
Be used for unit according to key frame duration real-time update;
Be used for selecting according to the user the described key images frame of a concrete channel of dynamic play, terminal again and the unit of the key frame images of another channel of decoding when changing channel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810096989A CN100589572C (en) | 2008-05-14 | 2008-05-14 | A kind of terminal and quick preview mobile TV channel method thereof |
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| CN200810096989A CN100589572C (en) | 2008-05-14 | 2008-05-14 | A kind of terminal and quick preview mobile TV channel method thereof |
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| CN100589572C true CN100589572C (en) | 2010-02-10 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101710933B (en) * | 2009-12-04 | 2013-05-01 | 深圳创维数字技术股份有限公司 | Image capturing method |
| CN102196001B (en) * | 2010-03-15 | 2014-03-19 | 腾讯科技（深圳）有限公司 | Movie file downloading device and method |
| CN101951483B (en) * | 2010-09-19 | 2016-03-30 | 中兴通讯股份有限公司 | The changing method of the television channel of mobile terminal and mobile terminal |
| CN101951505A (en) * | 2010-09-19 | 2011-01-19 | 宇龙计算机通信科技(深圳)有限公司 | Play control method for mobile television and mobile terminal |
| CN103108236A (en) * | 2011-11-15 | 2013-05-15 | 中兴通讯股份有限公司 | Method for previewing and playing of mobile television (TV) programs and corresponding system |
| CN103945258B (en) * | 2013-04-01 | 2017-07-11 | 海信集团有限公司 | A kind of channel switching method and radiovisor |
| CN103428572B (en) * | 2013-07-31 | 2017-03-15 | 小米科技有限责任公司 | A kind of methods, devices and systems for carrying out band prebrowsing |
| CN105847825A (en) * | 2015-01-16 | 2016-08-10 | 杭州海康威视数字技术股份有限公司 | Encoding, index storage and access methods for video encoding code stream and corresponding apparatus |
| CN105430446A (en) * | 2015-10-27 | 2016-03-23 | 深圳创维数字技术有限公司 | Set top box service pushing method, set top box, and related server |
| CN110784740A (en) * | 2019-11-25 | 2020-02-11 | 北京三体云时代科技有限公司 | Video processing method, device, server and readable storage medium |
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