CN107396169A - The control circuit and its data processing method of multimedia device - Google Patents
The control circuit and its data processing method of multimedia device Download PDFInfo
- Publication number
- CN107396169A CN107396169A CN201610325924.8A CN201610325924A CN107396169A CN 107396169 A CN107396169 A CN 107396169A CN 201610325924 A CN201610325924 A CN 201610325924A CN 107396169 A CN107396169 A CN 107396169A
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- medium data
- frame
- prestore
- video decoded
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4333—Processing operations in response to a pause request
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The present invention relates to a kind of data processing method of multimedia device, the multimedia device responds the broadcasting that a halt signal suspends a multi-medium data, and this method includes：The multi-medium data is kept in before the halt signal is received, to obtain a multi-medium data to prestore；The halt signal is responded, the multi-medium data that this is prestored writes a storage element；A play signal is responded, the multi-medium data to prestore is read from storage element note；And play the multi-medium data to prestore.
Description
Technical field
The present invention is on multimedia device, especially with respect to the multimedia device with time back track function.
Background technology
Multimedia device (such as box etc. on player, TV, machine) with time backtracking (timeshift) function provides
Pause function, it is allowed to which user is away from keyboard and will not miss wonderful programme content.Fig. 1 is that known multimedia device broadcasting is more
Media data and the flow chart for performing time back track function.When multimedia device receives multi-media signal, more matchmakers are first parsed
Body signal is to obtain the multi-medium data (step S110) entrained by the multi-media signal, such as multi-media signal is to transmit string
The form transmission of (transport stream) is flowed, then after this step removes the various headers (header) of transmission stream, is stayed
The multi-medium data of audio-visual information is carried down.Before halt signal is not received (step S115 is judged as NO), this is directly decoded
Multi-medium data (step S120), and pre-treatment (step S130) is played out to the multi-medium data before playing, such as solve
The staggeredly processing such as (de-interlace), scaling (scaling), then plays the multi-medium data (step S140).
When multimedia device receives halt signal (step S115 is judged as YES), the control circuit of multimedia device is first temporary
Break and put multi-medium data (step S150), then start multi-medium data write-in multimedia buffer unit (step S160),
Multi-medium data is write into storage element (step S170) again.In general, the access speed of multimedia buffer unit relatively stores
Unit is fast, but storage element has larger storage area；For example, multimedia buffer unit is volatile storage (example
Such as DRAM, SRAM), storage element is non-volatility memorizer (such as flash memory, solid hard disc, magnetic disc etc.).
Known time back track function after pause continued broadcasting (multi-medium file for being stored in storage element is decoded,
Play pre-treatment and broadcasting) when, the black picture of display can be often caused, reason is ability when multimedia device receives halt signal
Start the multi-medium data that storage does not decode instantly, but the picture now played on display is then picture earlier
(have been subjected to decoding and play pre-treatment), centre may have several figure frames (frame) drop (depending on multi-medium data form and
Depending on the processing speed of multimedia device).These lose the main reason for figure frame fallen is the black picture for causing the time when recalling.
The content of the invention
In view of the deficiency of prior art, it is an object of the present invention to provide a kind of control circuit of multimedia device and
Its data processing method, to improve the user of time back track function experience.
The present invention, which takes off, increases a kind of data processing method of multimedia device, and the multimedia device responds halt signal pause
The broadcasting of one multi-medium data, this method include：The multi-medium data is kept in before the halt signal is received, it is pre- to obtain one
The multi-medium data deposited；The halt signal is responded, the multi-medium data that this is prestored writes a storage element；Respond one and play letter
Number, read the multi-medium data to prestore from storage element note；And play the multi-medium data to prestore.
The present invention separately discloses a kind of control circuit of multimedia device, and the multimedia device includes a multimedia buffer unit
And a storage element, and the broadcasting that a halt signal suspends a multi-medium data is responded, the control circuit includes：One transmission string
Stream processing unit, for parsing a multi-media signal to produce the multi-medium data；And a control unit, it is following for performing
Operation：Before the halt signal is received, the multi-medium data is kept in the multimedia buffer unit, prestored with obtaining one
Multi-medium data；The halt signal is responded, the multi-medium data that this is prestored writes the storage element；A play signal is responded,
The multi-medium data to prestore is read from the storage element；And play the multi-medium data to prestore.
The control circuit and its data processing method of the multimedia device of the present invention can store up in advance before pause plays
Deposit multi-medium data, allow it is follow-up playback operation reach it is seamless playback, to lift user's experience.Compared to traditional skill
Art, the control circuit and its data processing method of multimedia device of the invention can avoid the generation of black picture.
Feature, implementation and effect for the present invention, accompanying drawing is hereby coordinated to make embodiment detailed description as follows.
Brief description of the drawings
Fig. 1 is that known multimedia device plays multi-medium data and performs the flow chart of time back track function；
Fig. 2 is the functional block diagram of an embodiment of multimedia device of the present invention；
Fig. 3 is the flow chart of a data processing method of multimedia device of the present invention；And
Fig. 4 is the operating process that multimedia device of the present invention playbacks the multi-medium data to prestore.
Symbol description
200 multimedia devices
210 control signal receiving units
220 control circuits
230 multimedia buffer units
240 storage elements
250 picture buffering units
221 demodulating units
223 transmission stream processing units
225 video decoded units
227 message decoding units
229 control units
S110~S170, S310~S380, S405~S470 steps
Embodiment
Disclosure of the present invention includes the control circuit and its data processing method of multimedia device, can avoid black picture
The generation in face is experienced with lifting user.Be embodied as it is possible under the premise of, the art tool usually intellectual can be according to
The content that this specification discloses selects equivalent element or step to realize the present invention, that is, the implementation of the present invention is not limited to
The embodiment chatted afterwards.
Fig. 2 is the functional block diagram of an embodiment of multimedia device of the present invention.Multimedia device 200 includes control signal
Receiving unit 210, control circuit 220, multimedia buffer unit 230, storage element 240 and picture buffering unit 250.Control
Signal receiving unit 210 is used for receiving control signal, such as halt signal or play signal.Control circuit 220 is used for data
Signal is handled, to produce image data to be played.Image data to be played is broadcast sending display (not shown) to
Picture buffering unit 250 (such as with DRAM implementations) is first temporarily stored in before putting.Multimedia buffer unit 230 and storage element 240
For storing the multi-medium data to be prestored caused by time back track function.Multimedia buffer unit 230 can be by access speed
Faster storing media (such as the volatile storage such as DRAM, SRAM, but be not limited) implementation, storage element 240 can be with
By the larger storing media of storage volume (such as the non-volatility memorizer such as flash memory, solid hard disc, magnetic disc, but not with
This is limited) implementation.Control circuit 220 includes demodulating unit 221, transmission stream processing unit 223, video decoded unit 225, sound
Interrogate decoding unit 227 and control unit 229.
Fig. 3 is coordinated to illustrate the details of operation of multimedia device of the present invention below, Fig. 3 is a number of multimedia device of the present invention
According to the flow chart of processing method.After multimedia device 200 receives data-signal, first data-signal is carried out by demodulating unit 221
Demodulation process, to produce multi-media signal (step S310).The multi-media signal of transmission stream form handles single through transmission stream
After member 223 is removed the dissection process such as header, multi-medium data (step S320) is produced, and control unit 229 is by more matchmakers
Volume data write-in multimedia buffer unit 230, the multi-medium data (step to be prestored in multimedia buffer unit 230
S330).Control unit 229 receives the halt signal (step S340) transmitted by control signal receiving unit 210 afterwards, control
Unit 229 controls the video decoded pause action of unit 225 and message decoding unit 227 so that the pause of multimedia device 200 plays
Multi-medium data (step S350), and the multi-medium data to prestore is write into storage element 240 (step S360).In step
In S350, control unit 229 can write down video decoded unit in the lump when the video decoded pause of unit 225 action is controlled
225 decoded state at that time.This decoded state is the Presentation Time Stamp note for the figure frame that video decoded unit 225 is decoding
(presentation time stamp, hereinafter referred to as PTS) and groups of pictures (group of pictures, hereinafter referred to as
POC).Can the decoded state of video decoded unit 225 playback work for when continuing later with broadcasting, completing seamless (seamless) and sentence
It is disconnected；The decoding operate of video decoded unit 225 can be avoided by dry in playing program afterwards by recording the figure frame decoded
Disturb (by being described in detail in the flow playbacked).Afterwards when user continues viewing, control unit 229 receives control signal and receives list
The play signal (step S370) that member 210 transmits, control unit 229 read the multi-medium data to prestore from storage element 240,
And give the multimedia data transmission to video decoded unit 225 and message decoding unit 227, to play the multimedia number to prestore
According to.
Due to the present invention multimedia device and its data processing method before halt signal is received just by more matchmakers
Volume data stores, so figure frame (the hereinafter referred to as target figure that video decoded unit 225 is decoding when receiving halt signal
Frame) corresponding to multi-medium data in fact be stored beforehand and (be contained in the above-mentioned multi-medium data to prestore
In), so when step S380 plays the multi-medium data that this prestores, can continue broadcasting from the target figure frame, therefore will not send out
The situation of picture loss or black picture in raw known technology.
In step S330, if multimedia buffer unit 230 has been fully written, new caused multi-medium data will override most
Old multi-medium data.It note that in various embodiments, it is more if the storage volume of multimedia buffer unit 230 is enough big
Media apparatus 200 can omit storage element 240, and the multi-medium data to prestore is stored in into multimedia buffer unit completely
In 230, when continuing to play afterwards, control unit 229 reads the multi-medium data to prestore from multimedia buffer unit 230,
In the case, above-mentioned step S360 can be corresponded to and omitted.
Fig. 4 is the operating process that multimedia device of the present invention playbacks the multi-medium data to prestore, i.e. the step S380's of Fig. 3
Thin portion flow.Control unit 229 first reads the multi-medium data to prestore after play signal is received from storage element 240, and will
The multimedia data transmission to prestore gives video decoded unit 225 and message decoding unit 227 (step S405), and controls video signal
The pause of decoding unit 225 receives the multi-medium data that transmission stream processing unit 223 is exported.Then the basis of control unit 229
In the decoded state for the video decoded unit 225 that step S350 is write down, to judge whether to carry out seamless to playback (step
S410).In more detail, in step S410, control unit 229 judges whether the PTS and POC of existing target figure frame note
Record, this PTS and POC are the foundation that video decoded unit 225 finds target figure frame later.So if in step S350 not into
Work(writes down PTS and POC, then target figure frame can not be found from the multi-medium data to prestore by representing, and also can not just be carried out seamless time
Broadcast.If can not carry out it is seamless playback, restart video decoded unit 225, and make video decoded unit 225 and message solution
Code unit 227 decodes to the multi-medium data to prestore, to play the multi-medium data (step S415) to prestore.On the contrary,
If control unit 229 step S415 judge can carry out it is seamless playback, control unit 229 control message decoding unit
227 pause decoding programs (step S420), and video decoded unit 225 then decodes the multi-medium data to prestore.But in order to keep away
The decoding operate for exempting from video decoded unit 225 is interfered, video signal solution of the control unit 229 to be write down in previous steps S350
Previous figure frame of figure frame (is still stored in the buffer cell of video decoded unit 225 or can be from the decoding of code unit 225
Obtained in the multi-medium data to prestore) completely whole picture buffering unit 250 (step S425) is write, further according to the multimedia number to prestore
According to data volume and the preset time (step S430) of format determination one.This preset time is for video decoded unit 225 from prestoring
Foregoing target figure frame is searched in multi-medium data.Because video decoded unit 225 must be to the multimedia number that prestores when searching
According to being decoded, if so the data volume of the multi-medium data to prestore is big, or each figure frame includes more pixel count
According to then the process of the video decoded searching target figure frame of unit 225 certainly will spend the more time.In general, when multimedia fills
When putting 200 and receiving halt signal, the data between multi-medium data and target figure frame that video decoded unit 225 is decoding
Amount is approximately equivalent to the reproduction time of 1 second, therefore control unit 229 (can mean video signal solution with the data format of highest resolution
It is most long that code unit 225 decodes time for being spent of a figure frame) and video decoded unit 225 decoding capability, searched to estimate
Seek the maximum of time.If the search of video decoded unit 225 exceedes this search time, control unit 229 judges can not be
The target figure frame is found in the multi-medium data to prestore.
Following control unit 229 controls video decoded unit 225 to search the target figure from the multi-medium data to prestore
Frame (step S435).Decoding order (decode order) the searching target figure frame of video decoded unit 225 according to figure frame, decoding
Order can be learnt from the PTS or POC of figure frame.In step S440, S445 and S450, control unit 229 persistently monitors video signal
Whether decoding unit 225 finds target figure frame in preset time.In more detail, video decoded unit 225 decodes what is prestored
Multi-medium data, if the PTS and POC of the figure frame solved are identical with the PTS and POC that are write down in step S350, then it represents that look for
To target figure frame.When video decoded unit 225 finds target figure frame in preset time (step S440 is judged as YES), video signal
Decoding unit 225 can send signal notice control unit 229, then control unit 229 controls the message decoding unit 227 to reply dynamic
Make (step S455), then control video decoded unit 225 and message decoding unit 227 to give up more matchmakers earlier than the target figure frame
Volume data, and the multi-medium data to prestore is decoded (step S460) using the target figure frame as starting point.Finally make decoding
The multi-medium data of completion reaches after document-video in-pace (step S465), you can plays multi-medium data (step S470).
On the other hand, if video decoded unit 225 can not find target figure frame in preset time, (step S445 judges
It is yes), then control unit 229 controls video decoded unit 225 to stop searching target figure frame (step S450), next equally enters
Row step S455~S470, but played after the target figure frame that can not now continue.Even if can not reach seamless play, the present invention is
Multi-medium data is stored in advance when receiving halt signal, so still there is preferable user to experience compared to known technology.
Foregoing data-signal can be various live crossfire signals, such as live DVB-T signal, live
Analog television signal and the on-the-spot broadcasting signal at networking etc..
Due to the art tool usually intellectual can by Fig. 2 device invent disclosure come understand Fig. 3 and
Fig. 4 method invention implementation detail and change, thus while embodiments of the invention as described above, but those embodiments simultaneously
Non- to be used for limiting the present invention, the art tool usually intellectual can be according to the content expressed or implied of the invention to this hair
Bright technical characteristic imposes change, and all this kind change may belong to the patent protection category sought by the present invention, in other words,
The scope of patent protection of the present invention is defined by following claims to be defined.
Claims (14)
1. a kind of data processing method of multimedia device, the multimedia device responds a halt signal and suspends a multi-medium data
Broadcasting, this method includes：
The multi-medium data is kept in before the halt signal is received, to obtain a multi-medium data to prestore；
The halt signal is responded, the multi-medium data that this is prestored writes a storage element；
A play signal is responded, the multi-medium data to prestore is read from storage element note；And
Play the multi-medium data to prestore.
2. the method as described in claim 1, it is characterised in that the broadcasting this prestore multi-medium data the step of include：
According to a decoding order of the multi-medium data, a target figure frame is searched in the multi-medium data to be prestored from this；And
Using the target figure frame as starting point, the multi-medium data to prestore is played.
3. method as claimed in claim 2, it is characterised in that the target figure frame system multimedia device receives the halt signal
When the figure frame that is decoding.
4. method as claimed in claim 2, it is characterised in that the multimedia device, which includes, to be used for searching the one of the target figure frame
Video decoded device, this method also include：
The halt signal is responded, records a decoded state of the video decoded device；And
The broadcasting this prestore multi-medium data the step of also include：
Decide whether to restart the video decoded device according to the decoded state.
5. method as claimed in claim 4, it is characterised in that the broadcasting this prestore multi-medium data the step of also include：
Determine not restarting the video signal the step of this decides whether to restart the video decoded device according to the decoded state
Decoder, according to the data volume and form of the multi-medium data to prestore, determine a search time；And
When the video decoded device does not find the target figure frame yet after the search time terminates, the video decoded device is controlled to stop searching
The target figure frame is sought, and decodes the multi-medium data to prestore.
6. method as claimed in claim 4, it is characterised in that the multimedia device also includes a message decoder, the broadcasting
The step of multi-medium data to prestore, also includes：
Determine not restarting the video signal the step of this decides whether to restart the video decoded device according to the decoded state
Decoder, the message decoder is controlled to suspend decoding program；And
When the video decoded device finds the target figure frame, the message decoder is controlled to decode the multi-medium data to prestore.
7. the method as described in claim 1, it is characterised in that the multimedia device includes a video decoded device and a picture delays
Unit is rushed, this method also includes：
The halt signal is responded, controls the video decoded device to write the picture buffering list with the previous figure frame of figure frame in a decoding
Member；
Wherein, when the figure frame multimedia device receives the halt signal in the decoding, figure frame that the video decoded device is decoding.
8. a kind of control circuit of multimedia device, the multimedia device includes a multimedia buffer unit and a storage element,
And the broadcasting that a halt signal suspends a multi-medium data is responded, the control circuit includes：
One transmission stream processing unit, for parsing a multi-media signal to produce the multi-medium data；And
One control unit, for performing following operation：
Before the halt signal is received, the multi-medium data is kept in the multimedia buffer unit, prestored with obtaining one
Multi-medium data；
The halt signal is responded, the multi-medium data that this is prestored writes the storage element；
A play signal is responded, the multi-medium data to prestore is read from the storage element；And
Play the multi-medium data to prestore.
9. control circuit as claimed in claim 8, it is characterised in that also include：
One video decoded device, couple the transmission stream processing unit；
Wherein the control unit also performs following operation：
A decoding order of the video decoded device according to the multi-medium data is controlled, one is searched in the multi-medium data to be prestored from this
Target figure frame；And
Using the target figure frame as starting point, the multi-medium data to prestore is played.
10. control circuit as claimed in claim 9, it is characterised in that it is temporary that the target figure frame is that the multimedia device receives this
Stop the figure frame decoded during signal.
11. control circuit as claimed in claim 9, it is characterised in that the control unit also performs following operation：
The halt signal is responded, records a decoded state of the video decoded device；And
When the multi-medium data that this prestores is played, decide whether to restart the video decoded device according to the decoded state.
12. control circuit as claimed in claim 11, it is characterised in that in the control unit also perform following operation：
When determine do not restart the video decoded device, data volume and the multi-medium data according to the multi-medium data to prestore
Form, determine a search time；And
When the video decoded device does not find the target figure frame yet after the search time terminates, the video decoded device is controlled to stop searching
The target figure frame is sought, and decodes the multi-medium data to prestore.
13. control circuit as claimed in claim 11, it is characterised in that also include：
One message decoder, couple the video decoded device；
Wherein the control unit also performs following operation：
When determining not restart the video decoded device, the message decoder is controlled to suspend decoding program；And
When the video decoded device finds the target figure frame, the message decoder is controlled to decode the multi-medium data to prestore.
14. control circuit as claimed in claim 8, it is characterised in that in the multimedia device also include and be used for storing and waiting to broadcast
One picture buffering unit of the image data put, the control circuit also include：
One video decoded device；
Wherein the control unit also performs following operation：
The halt signal is responded, controls the video decoded device to write the picture buffering list with the previous figure frame of figure frame in a decoding
Member；
Wherein, when figure frame is that the multimedia device receives the halt signal in the decoding, figure that the video decoded device is decoding
Frame.
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| CN201610325924.8A CN107396169A (en) | 2016-05-17 | 2016-05-17 | The control circuit and its data processing method of multimedia device |
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| CN201610325924.8A CN107396169A (en) | 2016-05-17 | 2016-05-17 | The control circuit and its data processing method of multimedia device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110533576A (en) * | 2018-05-23 | 2019-12-03 | 瑞昱半导体股份有限公司 | Multimedia pipeline device |
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| CN110533576B (en) * | 2018-05-23 | 2022-11-11 | 瑞昱半导体股份有限公司 | Multimedia pipeline type device |
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