CN101277450A - Method and apparatus for switching program - Google Patents

Method and apparatus for switching program Download PDF

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Publication number
CN101277450A
CN101277450A CNA2008100938420A CN200810093842A CN101277450A CN 101277450 A CN101277450 A CN 101277450A CN A2008100938420 A CNA2008100938420 A CN A2008100938420A CN 200810093842 A CN200810093842 A CN 200810093842A CN 101277450 A CN101277450 A CN 101277450A
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China
Prior art keywords
program
adjacent
service numbers
frame
key frame
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CNA2008100938420A
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Chinese (zh)
Inventor
刘辉
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ZTE Corp
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ZTE Corp
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Priority to CNA2008100938420A priority Critical patent/CN101277450A/en
Publication of CN101277450A publication Critical patent/CN101277450A/en
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Abstract

The invention discloses a program switching method, comprising the following steps of: a, receiving one or more multiplex sub-frames to be switched in advance, caching a key frame therein; b, when switching to the program to be switched, establishing an image with the cached key frame of the program and broadcasting the image. The invention caches frame I of the program to be switched in advance; when switching to the program, a decoder positions to the frame I of the program fast to establish a complete program picture and broadcast the program picture, so as to reduce waiting time of switching program of user and accomplish smooth program switching; the invention is capable of caching one latest frame I of an adjacent program of a program broadcast currently only in advance, without treatment of audio section or data section in a multiplex sub-frame, so that the cost for system treatment is low and the memory consumption is low.

Description

A kind of program switching method and device
Technical field
The present invention relates to Mobile Multimedia Broadcasting, relate in particular to a kind of program switching method and device.
Background technology
CMMB (China Mobile Multimedia Broadcasting, Mobile Multimedia Broadcasting) be recently in a kind of multimedia broadcasting technology of generally promoting, this technology can make portable terminal receiving broadcast signal under mobile status, plays TV programme after treatment.And portable terminal can the program receiving TV Guide, demonstrates the rendition list, allows the user watch TV programme selectively.In addition, this technology is also supported the broadcasting of other multi-medium datas, as, real-time stock information and other information etc.
In Mobile Multimedia Broadcasting, every road TV programme all will take a broadcast channel, and in physical layer, the broadcast channel correspondence planning in advance good frequency and some time slots.When the user watched a certain program, portable terminal used the broadcast channel of this program correspondence to receive the multiplexed sub frame of this road program, and the multiplexed sub frame that receives is carried out demultiplexing, extracted wherein sound, video data, gave sound, video decoder decodes, play.
When the user when a program switches to the another one program, portable terminal need switch to the broadcast channel of new program from the broadcast channel of current program, and after Video Decoder must receive an I frame (key frame) by the time, just can construct the complete picture of a frame.I frame (Intra picture, inner picture) is first frame of each GOP (Group Of Pictures, picture group, a kind of video compression technology that MEPG uses).Because time interval of I frame is longer, so need the user to wait for the long time when making up the first frame picture of new program, will make the user feel that the program switch speed is very slow like this, it is level and smooth inadequately to change platform, influences user's experience.
Long stand-by period when avoiding changing platform, bring uncomfortable impression to the user, common way is at present, when the picture of new program does not also occur, on player interface, show a static images, the local video file of perhaps playing one section short and small occupies this section stand-by period, makes the interface relatively more friendly.Yet this solution does not fundamentally reduce user's stand-by period, not from solving the long problem of platform stand-by period of changing in essence.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of program switching method and device, shortens and changes the platform stand-by period, the speed when the raising user carries out the program switching.
For solving the problems of the technologies described above, a kind of program switching method of the present invention comprises the steps: a: receive the multiplexed sub frame of one or more to be switched programs, the key frame that wherein comprises is carried out buffer memory in advance; B: when switching to be switched program, use the key frame design of graphics picture and the broadcast of this program of buffer memory.
Further, to be switched program is the adjacent program of current playing program.
Further, when in step a key frame being carried out buffer memory, according to " picture frame type " field of the video-frequency band of multiplexed sub frame, the video unit that with this field identification is key frame is as the key frame buffer memory.
Further, finish the buffer memory of key frame of a program after, when receiving the next key frame of this program, use back one key frame to cover the key frame of previous preservation.
Further, when the user carries out the program switching, service numbers and adjacent segments purpose service numbers that use will be switched program compare, when the service numbers that will switch program is identical with adjacent segments purpose service numbers, represent that then the user switches to the adjacent program of current playing program, then use the adjacent segments purpose key frame design of graphics picture and the broadcast of buffer memory.
Further, adjacent program comprises left adjacent program and right adjacent program, when the user switches to right adjacent program, close the broadcast channel of the adjacent program in a former left side, with former broadcast program as the adjacent program in a left side, receive its multiplexed sub frame, the buffer memory key frame is searched new right adjacent program from program guide, open its broadcast channel, receive its multiplexed sub frame, the buffering key frame; When the user switches to left adjacent program, close the broadcast channel of the adjacent program in the former right side, with former broadcast program as the adjacent program in the right side, receive its multiplexed sub frame, the buffer memory key frame is searched new left adjacent program from program guide, open its broadcast channel, receive multiplexed sub frame, the buffer memory key frame.
Further, a kind of program switching device shifter, comprise, the decoding broadcast unit, it is characterized in that this device also comprises, receiving element, buffer unit and switch unit, wherein: receiving element is used to receive the multiplexed sub frame of one or more to be switched programs, the key frame that wherein comprises is sent to buffer unit carry out buffer memory; Buffer unit is used for the key frame that the receiving element that receives sends is carried out buffer memory; Switch unit is used to receive user's switching command, extracts key frame from buffer unit, sends to the decoding broadcast unit; The decoding broadcast unit is used to use the key frame design of graphics picture of the switch unit transmission that receives and plays.
Further, also comprise the service numbers acquiring unit, the service numbers acquiring unit is used to obtain the service numbers of broadcast program, searches the adjacent segments purpose service numbers of broadcast program from program guide, and adjacent segments purpose service numbers is sent to receiving element.
Further, also comprise comparing unit, comparing unit obtains the service numbers that will switch program from switch unit, obtain the adjacent segments purpose service numbers of broadcast program from the service numbers acquiring unit, service numbers is compared, when identical, then notify switch unit from buffer unit, to extract key frame, send to the decoding broadcast unit.
Further, comparing unit also is used for the informing business acquiring unit and obtains the adjacent segments purpose service numbers that will switch program, receiving element also is used for after the adjacent segments purpose service numbers that will switch program that receives the transmission of service numbers acquiring unit, close current its service numbers that receives and be not included in the broadcast channel of the program in the service numbers that newly receives, open the broadcast channel of the program of the service numbers sign that newly receives, receive its multiplexed sub frame, and its key frame is sent to buffer unit carry out buffer memory.
In sum, the present invention passes through the I frame of the to be switched program of buffer memory in advance, when switching to this program, decoder navigates to the I frame of this program rapidly, construct a complete program picture and give player and play, thereby reduced the stand-by period the when user changes platform, realized smoothly changing platform, and can be only up-to-date I frame of adjacent segments purpose of buffer memory current playing program in advance, audio section in the multiplexed sub frame and data segment are not handled, so the overhead of handling is little, memory consumption is also little.
Description of drawings
Fig. 1 is of the present invention when user's broadcast program and the process chart when changing platform;
Fig. 2 is an order of the present invention schematic diagram when switching program;
Fig. 3 is the process chart of user of the present invention when switching to right adjacent program;
Fig. 4 is the composition schematic diagram of apparatus of the present invention.
Embodiment
The present invention passes through the video I frame of the to be switched program of buffer memory in advance, can find the I frame of this program when switching to this program rapidly, makes up the program image.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described:
As shown in Figure 1, method of the present invention comprises foreground processing and two threads of background process, when the user selects to play certain program first, receives the multiplexed sub frame of broadcast program in handle on the foreground, parses sound, video data, sends to player and plays.
In background process, whole non-current playing program in the program guide can be received its multiplexed sub frame as to be switched program, I frame to the multiplexed sub frame that receives carries out buffer memory in advance, in the time of so just can guaranteeing that the user switches to arbitrary program in the program guide, all can be apace the I frame of the to be switched program of buffer memory being sent to decoder decodes and plays, can there be long changing the platform stand-by period, yet this way will produce huge overhead and memory consumption, for reducing overhead and memory consumption, only from program guide, obtain the left adjacent program of current playing program and the service numbers of right adjacent program in the present embodiment, open the broadcast channel of two adjacent programs according to adjacent segments purpose service numbers, receive multiplexed sub frame, for further reducing overhead and memory consumption, can be according to the sign of " picture frame type " field of multiplexed sub frame, only select the I frame to preserve not processing audio section and data segment, specifically comprise the steps:
101: behind the program that the user selects to play,, from program guide, search the adjacent segments purpose service numbers of broadcast program according to the service numbers of broadcast program;
Because the user is when changing platform, get used to order and switch to the adjacent program of current playing program, therefore, the adjacent segments purpose probability that switches to broadcast program is just very high, searching adjacent segments purpose service numbers and its video of buffer memory I frame in advance, will be highly effective for the platform speed of changing that improves the user.
The adjacent program of above-mentioned broadcast program is meant program adjacent with broadcast program in program guide.As shown in Figure 2, in program guide, all programs constitute an end to end ring when order is switched, always two of the number of programs adjacent with current playing program, be called left adjacent program and right adjacent program, when under current playing program, taking rollback operation, then switch to the left adjacent program of current playing program; When taking forward operation, then switch to the right adjacent program of current playing program.
When from program guide, searching the adjacent segments purpose service numbers of broadcast program, because program guide adopts tabular form, therefore, the service numbers of current playing program be can in program guide, navigate to, from tabulation, the left adjacent program adjacent and the service numbers of right adjacent program obtained again with current playing program.
102: after getting access to adjacent segments purpose service numbers,, open its broadcast channel according to adjacent segments purpose service numbers, the multiplexed sub frame of program receiving, and the I frame of multiplexed sub frame carried out buffer memory;
Because the broadcast channel that portable terminal needs to open three road programs at least simultaneously receives multiplexed sub frame, therefore, can support to receive multi-channel program simultaneously for the TV chip requirement of portable terminal, be at least three the tunnel.
Above-mentioned I frame is meant that according to the CMMB multiplex protocol, " picture frame type " field identification of the video-frequency band in the multiplexed sub frame is the video unit of I frame.
When receiving next multiplexed sub frame, be that the video unit of I frame carries out buffer memory still, and cover the video I frame of previous preservation " picture frame type " field identification of this multiplexed sub frame.Then in internal memory, hew out left adjacent program buffer and right adjacent program buffer respectively for adjacent program in a left side and right adjacent program, and carry out the buffer memory of I frame respectively.The employing overlapping operation can guarantee to be always in internal memory left adjacent program and right adjacent program is distinguished up-to-date video I frame of buffer memory in advance, save memory expense.
103: when the user carries out the program switching, service numbers and adjacent segments purpose service numbers that use will be switched program compare, when the service numbers that will switch program is identical with adjacent segments purpose service numbers, use this adjacent segments purpose I frame design of graphics picture and the broadcast of buffer memory in advance;
Design of graphics as the time, the adjacent segments purpose I frame of buffer memory is in advance sent to decoder, decoder decode goes out video data, promptly finishes the structure of image, and sends to player and play.
At this moment, can use the service numbers that to switch program and the service numbers of left adjacent program and the service numbers of right adjacent program to compare, when identical with the service numbers of the adjacent program in a left side, then expression switches to left adjacent program, takes out the I frame and send to decoder decode and play from the adjacent program buffer in a left side; When identical with the service numbers of the adjacent program in the right side, then expression switches to right adjacent program, takes out the I frame and send to decoder decode and play from the adjacent program buffer in the right side.
104: play the image that makes up by the I frame of buffer memory in advance after, continue to receive multiplexed sub frame, and be sent to decoder and decode from adjacent segments purpose broadcast channel, finish sending to player after the decoding and play;
After the program switching is finished, will transfer foregrounding to the adjacent segments purpose consistency operation that switches to.
105: simultaneously, switch program to adjacent program, search the adjacent program of the broadcast program after program switches, receive adjacent segments purpose multiplexed sub frame, the I frame is carried out buffer memory, got inferior program ready and switched when the foreground;
At this, it is identical with search procedure in the step 101 to search the adjacent segments purpose process of current playing program, and it is identical with process of caching in the step 102 that video I frame is carried out the process of buffer memory.
For example, when the user switches to right adjacent program, close the broadcast channel of the adjacent program in an original left side, as the adjacent program in a left side, its broadcast channel is opened with former broadcast program, then directly receives multiplexed sub frame, buffer memory I frame; Because original right adjacent program has become current playing program, therefore, searches new right adjacent program from program guide, opens its broadcast channel, at its I frame of back buffer.
Equally, when the user switches to left adjacent program, close the broadcast channel of the adjacent program in the former right side, former broadcast program is as the adjacent program in the right side, opened because of its broadcast channel, then directly receive multiplexed sub frame, buffer memory I frame on the backstage; Because original left adjacent program has become current playing program, therefore, searches new left adjacent program from program guide, opens its broadcast channel, at its I frame of back buffer.
106: when the user withdraws from when televising device, close the program and the adjacent segments purpose broadcast channel thereof of current broadcast, and be released to buffer memory adjacent segments purpose I frame in advance and the core buffer opened up.
Using example by one more below describes the foregoing description.Please refer to Fig. 3.When the user when current broadcast program switches to right adjacent program, comprise the steps:
301: when playing current program, the I frame of the right adjacent program of buffer memory current playing program and left adjacent program in advance on the backstage;
302: when the user when current playing program switches to right adjacent program, from the adjacent program buffer in the right side, take out its I frame, send to decoder and decode, construct the first frame picture fast and play;
303: then, continue to receive the multiplexed sub frame of this program, and play the follow-up sound of receiving, video data;
304: former broadcast program as the adjacent program in a left side, because its broadcast channel is opened, so continue to receive its multiplexed sub frame, is cushioned its I frame;
305: in program guide, seek the service numbers of the right adjacent program of current playing program, open its broadcast channel, receive its multiplexed sub frame, buffering I frame according to service numbers.
As shown in Figure 4, a kind of program switching device shifter of the present invention comprises: service numbers acquiring unit, receiving element, switch unit, buffer unit, decoding broadcast unit and comparing unit, wherein,
The service numbers acquiring unit is used for according to the service numbers of broadcast program, searching the adjacent segments purpose service numbers of broadcast program from program guide, and adjacent segments purpose service numbers being sent to receiving element when playing a certain program;
Receiving element is used for opening its broadcast channel according to adjacent segments purpose service numbers, receives the multiplexed sub frame of this program by broadcast channel, and the I frame of multiplexed sub frame is sent to buffer unit carries out buffer memory; Also be used for after the adjacent segments purpose service numbers of the broadcast program that receives the transmission of service numbers acquiring unit, close current reception according to the adjacent segments purpose service numbers of broadcast program, and its service numbers is not included in the broadcast channel of the program in the service numbers that newly receives, stop to receive its multiplexed sub frame, open the broadcast channel of the program of the service numbers sign that newly receives, receive its multiplexed sub frame and its I frame is sent to buffer unit and carry out buffer memory;
Buffer unit is used for the key frame that the receiving element that receives sends is carried out buffer memory;
Switch unit is used to receive user's switching command, extracts adjacent segments purpose I frame from buffer unit, sends to the broadcast of decoding of decoding broadcast unit;
Comparing unit is used for after switch unit receives user's switching command, obtain the service numbers that to switch program from switch unit, obtain the adjacent segments purpose service numbers of broadcast program from the service numbers acquiring unit, service numbers and adjacent segments purpose service numbers that use will be switched program compare, when the service numbers that will switch program is identical with adjacent segments purpose service numbers, then send control information to switch unit, the notice switch unit extracts key frame from buffer unit, send to the decoding broadcast unit; Simultaneously obtain the adjacent segments purpose service numbers that to switch program to service numbers acquiring unit transmission control information notifying service numbers acquiring unit;
The decoding broadcast unit is used to use the key frame design of graphics picture of the switch unit transmission that receives and plays.
Certainly; the present invention also can have other embodiment; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims (10)

1, a kind of program switching method is characterized in that, comprises the steps:
A: receive the multiplexed sub frame of one or more to be switched programs, the key frame that wherein comprises is carried out buffer memory;
B: when switching to described to be switched program, use buffer memory this program key frame design of graphics picture and play.
2, the method for claim 1 is characterized in that, described to be switched program is the adjacent program of current playing program.
3, method as claimed in claim 2 is characterized in that, when in step a described key frame being carried out buffer memory, according to " picture frame type " field of the video-frequency band of multiplexed sub frame, the video unit that with this field identification is key frame is as the key frame buffer memory.
4, method as claimed in claim 3 is characterized in that, finish the buffer memory of key frame of a program after, when receiving the next key frame of this program, use back one key frame to cover the key frame of previous preservation.
5, method as claimed in claim 4, it is characterized in that, when the user carries out the program switching, service numbers and adjacent segments purpose service numbers that use will be switched program compare, when the service numbers that will switch program is identical with adjacent segments purpose service numbers, represent that then the user switches to the adjacent program of current playing program, then use the adjacent segments purpose key frame design of graphics picture and the broadcast of buffer memory.
6, method as claimed in claim 5, it is characterized in that described adjacent program comprises left adjacent program and right adjacent program, when the user switches to right adjacent program, close the broadcast channel of the adjacent program in a former left side, former broadcast program as the adjacent program in a left side, is received its multiplexed sub frame, the buffer memory key frame, from program guide, search new right adjacent program, open its broadcast channel, receive its multiplexed sub frame, the buffering key frame; When the user switches to left adjacent program, close the broadcast channel of the adjacent program in the former right side, with former broadcast program as the adjacent program in the right side, receive its multiplexed sub frame, the buffer memory key frame is searched new left adjacent program from program guide, open its broadcast channel, receive its multiplexed sub frame, the buffer memory key frame.
7, a kind of program switching device shifter comprises, the decoding broadcast unit is characterized in that this device also comprises, receiving element, buffer unit and switch unit, wherein:
Receiving element is used to receive the multiplexed sub frame of one or more to be switched programs, the key frame that wherein comprises is sent to buffer unit carry out buffer memory;
Buffer unit is used for the key frame that the receiving element that receives sends is carried out buffer memory;
Switch unit is used to receive user's switching command, extracts key frame from buffer unit, sends to the decoding broadcast unit;
The decoding broadcast unit is used to use the key frame design of graphics picture of the switch unit transmission that receives and plays.
8, device as claimed in claim 7, it is characterized in that also comprise the service numbers acquiring unit, described service numbers acquiring unit is used to obtain the service numbers of broadcast program, from program guide, search the adjacent segments purpose service numbers of broadcast program, adjacent segments purpose service numbers is sent to receiving element.
9, device as claimed in claim 8, it is characterized in that, also comprise comparing unit, described comparing unit obtains the service numbers that will switch program from switch unit, obtain the adjacent segments purpose service numbers of broadcast program from the service numbers acquiring unit, service numbers is compared, when identical, then notify switch unit from buffer unit, to extract key frame, send to the decoding broadcast unit.
10, device as claimed in claim 9, it is characterized in that, described comparing unit also is used for the informing business acquiring unit and obtains the adjacent segments purpose service numbers that will switch program, receiving element also is used for after the adjacent segments purpose service numbers that will switch program that receives the transmission of service numbers acquiring unit, close current its service numbers that receives and be not included in the broadcast channel of the program in the service numbers that newly receives, open the broadcast channel of the program of the service numbers sign that newly receives, receive its multiplexed sub frame, and its key frame is sent to buffer unit carry out buffer memory.
CNA2008100938420A 2008-04-30 2008-04-30 Method and apparatus for switching program Pending CN101277450A (en)

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Cited By (14)

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CN103200445A (en) * 2012-01-06 2013-07-10 先科研有限公司 Network television programme play and intelligent buffering management method and system and network television
WO2014067484A1 (en) * 2012-11-02 2014-05-08 华为终端有限公司 Method for displaying picture, control device and media player
CN103945258A (en) * 2013-04-01 2014-07-23 海信集团有限公司 Channel switching method and television receiving device
WO2014183674A1 (en) * 2013-12-06 2014-11-20 中兴通讯股份有限公司 Media play method and device, and set top box
WO2014194814A1 (en) * 2013-06-07 2014-12-11 华为终端有限公司 Method, device, and system for improving channel change speed
CN105744371A (en) * 2014-12-09 2016-07-06 深圳Tcl数字技术有限公司 Stream media data play method and device
CN105898518A (en) * 2015-12-28 2016-08-24 乐视网信息技术(北京)股份有限公司 Interface display method and device in video loading process
CN106412629A (en) * 2016-10-08 2017-02-15 广东欧珀移动通信有限公司 Media data transmission processing method, device and system
CN106454502A (en) * 2016-09-30 2017-02-22 深圳市九洲电器有限公司 Television program channel switching preview method and system
WO2017077377A3 (en) * 2015-11-03 2017-07-13 中兴通讯股份有限公司 Station switching method and device, set-top box, and storage medium
CN110310672A (en) * 2018-03-27 2019-10-08 厦门歌乐电子企业有限公司 A kind of music player and its control method
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
CN111093090A (en) * 2018-10-24 2020-05-01 玲珑视界科技(北京)有限公司 TCP-based multicast channel fast switching system and method
CN111356007A (en) * 2018-12-24 2020-06-30 深圳Tcl数字技术有限公司 Broadcast channel switching method and system, television and storage medium

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CN103200445B (en) * 2012-01-06 2017-05-24 先科研有限公司 Network television programme play and intelligent buffering management method and system and network television
CN103200445A (en) * 2012-01-06 2013-07-10 先科研有限公司 Network television programme play and intelligent buffering management method and system and network television
WO2014067484A1 (en) * 2012-11-02 2014-05-08 华为终端有限公司 Method for displaying picture, control device and media player
US9848234B2 (en) 2012-11-02 2017-12-19 Huawei Device (Dongguan) Co., Ltd. Method, control point, and media renderer for displaying picture
CN103945258A (en) * 2013-04-01 2014-07-23 海信集团有限公司 Channel switching method and television receiving device
CN103945258B (en) * 2013-04-01 2017-07-11 海信集团有限公司 A kind of channel switching method and radiovisor
WO2014194814A1 (en) * 2013-06-07 2014-12-11 华为终端有限公司 Method, device, and system for improving channel change speed
CN104702994A (en) * 2013-12-06 2015-06-10 中兴通讯股份有限公司 Media play method, media play device and set top box
WO2014183674A1 (en) * 2013-12-06 2014-11-20 中兴通讯股份有限公司 Media play method and device, and set top box
CN105744371B (en) * 2014-12-09 2019-05-10 深圳Tcl数字技术有限公司 The playback method and device of stream medium data
CN105744371A (en) * 2014-12-09 2016-07-06 深圳Tcl数字技术有限公司 Stream media data play method and device
WO2017077377A3 (en) * 2015-11-03 2017-07-13 中兴通讯股份有限公司 Station switching method and device, set-top box, and storage medium
CN105898518A (en) * 2015-12-28 2016-08-24 乐视网信息技术(北京)股份有限公司 Interface display method and device in video loading process
WO2018059162A1 (en) * 2016-09-30 2018-04-05 深圳市九洲电器有限公司 Television program preview method utilized in channel switching, system, and electronic apparatus
CN106454502A (en) * 2016-09-30 2017-02-22 深圳市九洲电器有限公司 Television program channel switching preview method and system
CN106412629A (en) * 2016-10-08 2017-02-15 广东欧珀移动通信有限公司 Media data transmission processing method, device and system
CN110310672A (en) * 2018-03-27 2019-10-08 厦门歌乐电子企业有限公司 A kind of music player and its control method
CN110310672B (en) * 2018-03-27 2023-06-23 厦门歌乐电子企业有限公司 Music player and control method thereof
CN111093090A (en) * 2018-10-24 2020-05-01 玲珑视界科技(北京)有限公司 TCP-based multicast channel fast switching system and method
CN111356007A (en) * 2018-12-24 2020-06-30 深圳Tcl数字技术有限公司 Broadcast channel switching method and system, television and storage medium
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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Open date: 20081001