CN100380931C

CN100380931C - Method for controlling transparency projection service using digital multi-media broadcast

Info

Publication number: CN100380931C
Application number: CNB2005100331293A
Authority: CN
Inventors: 李吉城; 崔镕勋
Original assignee: LG Electronics Huizhou Co Ltd
Current assignee: LG Electronics Huizhou Co Ltd
Priority date: 2005-02-01
Filing date: 2005-02-01
Publication date: 2008-04-09
Anticipated expiration: 2025-02-01
Also published as: CN1816112A

Abstract

The present invention relates to a method used for controlling the triggering time of static images forming a slide in the process of playing the slide by using digital multimedia broadcasts, which is characterized in that the display of slide images received in a former frame is controlled by using the information of the triggering time contained in a currently received slide object.

Description

Utilize DMB to control the slideshow service method

[technical field]

This invention is to be used for controlling the method that lantern slide is formed the triggered time of part static images about utilizing DMB to carry out slideshow service (slide service) in the data playback service, referring in particular to.

[background technology]

Generally speaking, utilize DMB (Digital Multimeida Broadcasting, hereinafter to be referred as DMB) the slideshow service carried out is meant: provide information such as picture, photo or text by the supplier by orderly static images form, and it is numbered the service that shows by visual format then by receiver.

So-called slideshow service typically refers to the static images that transmitter utilizes the transmission of multimedia object transmission (MOT) agreement JPG, the PNG of DMB, on receiver,, show (presentation) by the static images that constitutes lantern slide through after the numbering process.And the demonstration of static images is finished by triggered time information.

In order to understand and master the triggered time, be necessary the multimedia object host-host protocol is understood and mastered.

Fig. 1 is the structural representation that constitutes the multimedia object of MOT agreement, and it is made up of heading frame, header extension name (header extension) and text (body).

Heading frame (header core) comprises the size (size) of relevant multimedia object and the information of type (type), its structure such as Fig. 2.

As shown in Figure 2, heading frame (header core) is by 28 bits of expression text (body) size, 13 bits of expression title (header) size, 6 bits of expression Directory Type (content type) and 9 bits of expression catalogue subtype (content subtype), and totally 7 bytes (equaling 56 bits) constitute.

Contain the information of process object of being used in the header extension name (header extension), comprising required directory name (Content Name) and the triggered time (Trigger Time) of slideshow service.

Directory name (Content Name) be give each image that constitutes the slideshow process name, and the triggered time (Trigger Time) is the part of this image temporal information of demonstration.

Existing triggered time control method has three kinds.

First kind: method that will set " Now " triggered time for.After finishing reception and numbering, show lantern slide immediately exactly.But the problem that this method exists is different along with transmitter and the distance of receiver, the performance of receiver etc., will show in the different separately time.

Second kind: method that will set " UTC (Universal Time Co-ordinated) " triggered time for.The UTC standard value that lantern slide is comprised in the high speed information channel (Fast Information Channel:FIC) by the DMB frame and showing in time of determining exactly.

But the problem that this method exists is just should determine the triggered time usually when sending lantern slide, especially when directly broadcasting (live broadcasting) program, exists the problem that audio sync and projectionist change aspects such as image rapidly.

The third: append transmit title upgating object (Header UpdateObject) with " Now " or " UTC " value thus under the state that does not have triggered time information, definite triggered time that sends to the slideshow object of all terminating machines in advance.The problem that this method exists is: though it has the advantage that can give a response rapidly, transmit the title upgating object owing to must append, so can cause indirect expense (overhead) expenditure.

[summary of the invention]

This invention finds out for addressing the above problem, and purpose is to provide and adopts DMB control slideshow service method, and it can change aspect such as image at audio sync and projectionist and give a response rapidly.

Second purpose of this invention is: provide to need not to append extra charge is used to constitute lantern slide with regard to may command triggered time of static images this " utilizes DMB to control the slideshow service method ".

Another purpose of this invention is: can solve the problem that shows in the different separately time with the distance of receiver, the performance situation of receiver etc. according to transmitter.

To achieve these goals, this invention about the characteristics of " utilizing the lantern slide service control method of DMB " is: utilize the current triggered time information that slideshow object comprised that receives, be controlled at the demonstration of the received lantern slide image of former frame.

According to another characteristics of this invention, utilize the lantern slide service control method of DMB, comprise following step:

The 1st step, the reception condition of perception slideshow object;

The 2nd step if receive slideshow object, is just recombinated to the lantern slide image that is comprised in the slideshow object;

The 3rd step extracts the triggered time from above-mentioned slideshow object, and the lantern slide image after the above-mentioned reorganization is stored in storage part temporarily;

The 4th step if the above-mentioned triggered time arrives, just shows the lantern slide image that former frame is received; The 5th step is returned above-mentioned the 1st step.

This method preferably also comprises: after above-mentioned the 4th step, be stored in the interior lantern slide image of above-mentioned storage part through after playing up temporarily, be stored in the step of playing up in the buffer, the described process that the image of compression is decoded that is meant of playing up.

As mentioned above, " the relevant DMB that adopts controls the slideshow service method " has following effect in this invention:

The first, can solve owing to receive the problem that the performance that can not scan the distance according to transmitter and receiver that caused, receiver after the slideshow object at once scanned in the different separately time.

The second owing to do not determine the triggered time at the time point that transmits lantern slide, institute so that the projectionist that reaches synchronously of audio service change image rapidly and become and be easy to.

The 3rd, owing to needn't append the data of transmission " title upgating object " and so on, can prevent the extra-pay expenditure.

Content by above-mentioned explanation as can be known, the related work personnel can carry out various change and modification fully in the scope that does not break away from this invention technological thought.

Given this, the technical scope of this invention is not limited to the content that embodiment puts down in writing, and should decide according to patent claim.

Other purpose, characteristics and the advantage of this invention just can come into plain view by the detailed description of accompanying drawing illustrated embodiment.

[description of drawings]

Fig. 1 is the structural representation that constitutes the multimedia object of multimedia object transmission (MOT) agreement among the DMB.

Fig. 2 is the structural representation of heading frame in the multimedia object (Header Core).

Fig. 3 is the function timing figure that utilizes the lantern slide receiver of DMB in this invention.

Fig. 4 is the control method flow chart of slideshow service in this invention.

[embodiment]

Formation and applicable cases thereof to this invention embodiment describes with reference to the accompanying drawings.Shown in the accompanying drawing and formation and the application of making this invention of related description describe by more than one embodiment, hence one can see that, technological thought of above-mentioned this invention and core thereof constitute and use and do not limited to.

Fig. 3 is about the function timing figure of the lantern slide receiver that adopts DMB in this invention.Notion to this invention describes with reference to the accompanying drawings.

N the slideshow object that includes N lantern slide image will be utilized multimedia object transmission (MOT) agreement and send receiver to the form of DMB frame, and receiver obtains triggered time information and the lantern slide image that slideshow object comprised by the number of separating process.

Wherein, triggered time information is not controlled the current demonstration that receives the lantern slide image, but control former frame received slideshow object, promptly controls the demonstration of the lantern slide image that N-1 the slideshow object that receives comprise.

That is to say, understand the triggered time information that be encoded (Coding) becomes " NOW " or " UTC ", control the demonstration of the lantern slide image that former reception is also being stored temporarily.

Fig. 4 is the flow chart of this invention about the slideshow service control method.With reference to Fig. 4 the control method of the slideshow service of this invention is carried out specific description more below.

The part of representing with solid line among Fig. 4 is meant processing and the related content that receives the lantern slide image to current, and the part that dotted line is represented is meant processing and the related content that former frame is received the lantern slide image.

Whether receive slideshow object by the receiver perception, step S401 if receive slideshow object, then is divided into the slideshow object that receives fragment (segment), reformulates image file, step S402.

Then, extract the triggered time information that above-mentioned slideshow object comprises, step S403.

Provide this triggered time information be for the demonstration of controlling the received lantern slide image of former frame 1..

If the triggered time information extraction finishes,, and it is stored in the storage buffer (holding buffer) temporarily then for the lantern slide image of the compressed file form after playing up (rendering) and reformulating.

As a rule, multimedia object is to be transmitted after making the form of compression files such as JPG, PNG, plays up (rendering) and is meant the process that JPG or PNG file are decoded, and is about to the process that the image of compression restores once more.

Although the back also will describe, be stored in the interior lantern slide image of above-mentioned storage buffer after the received lantern slide image of former frame shows, promptly be stored in then and play up in the buffer through render process.

Play up the lantern slide image that buffer memory is being stored up former frame reception and process render process owing to current, so till above-mentioned triggered time information will be waited until when arriving its triggered time always, step S405.

Then, if the triggered time arrives,, the above-mentioned lantern slide image of playing up the buffer memory storage 2. shows step S406 with regard to being copied in the screen buffer.

And, if the received lantern slide image scan of former frame finishes, just will output in the triggered time and be used to scan next lantern slide image in the storage buffer 3..

The lantern slide image store that the storage buffer that receives the triggered time will stored by the image render process is to playing up in the buffer, and turns back to initial condition 4., waits receiving next slideshow object.

After this, if receive slideshow object, the lantern slide image of so relevant slideshow object is then recombinated, and stores in the storage buffer, and extract the triggered time from relevant slideshow object.If the triggered time arrives, just show the lantern slide image of being stored in the storage buffer.If the lantern slide image shows finish, just will be stored in lantern slide image store in the storage buffer to playing up in the buffer, and turn back to initial condition, to enter the state that waits the next slideshow object of reception by render process.

Control demonstration by above process repeatedly to the lantern slide image.

Claims

1. utilize the lantern slide service control method of DMB, comprising:

Utilize the current triggered time information that comprises in the slideshow object that receives, control demonstration slide image that former frame receives.

2. utilize the lantern slide service control method of DMB, comprise following step:

The 1st step, the reception condition of perception slideshow object;

The 4th step if the above-mentioned triggered time arrives, just shows the lantern slide image that former frame is received;

The 5th step is returned above-mentioned the 1st step.

3. as the claim item 2 described lantern slide service control methods that utilize DMB, it is characterized in that described method also comprises:

After above-mentioned the 4th step, be stored in the interior lantern slide image of above-mentioned storage part through after playing up temporarily, be stored in the step of playing up in the buffer, the described process that the image of compression is decoded that is meant of playing up.