CN100367777C - Device and method for detecting real-time captions rolling - Google Patents
Device and method for detecting real-time captions rolling Download PDFInfo
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- CN100367777C CN100367777C CNB2005100088973A CN200510008897A CN100367777C CN 100367777 C CN100367777 C CN 100367777C CN B2005100088973 A CNB2005100088973 A CN B2005100088973A CN 200510008897 A CN200510008897 A CN 200510008897A CN 100367777 C CN100367777 C CN 100367777C
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Abstract
The present invention relates to an apparatus and a method thereof for detecting caption rolling in real time, and discloses a caption decoding unit and decoding-caption SPU stream to obtain the compressed data of a first caption and a second caption in order to generate the relevant data of the first caption and the second caption. Then, the obtained caption compressed data is transmitted to a receiving unit so that a detection module group detects the compressed data of the first caption and the second caption and obtains a deviation parameter in order to judge the caption rolling information of the second caption data in comparison to the first caption data.
Description
Technical field
The present invention is particularly to detect the first captions compression data and the second captions compression data, to learn the function of captions rolling information relevant for a kind of devices and methods therefor of detecting real-time captions rolling.
Background technology
In recent years, the continuous lifting of standard of living, the rise of fast food doctrine, people are accustomed to life style fast, easily gradually, Information technology is also along with this trend, continue to improve the quality of information-technology products, only for more suiting the common people's user demand, wherein, information-technology products are again the main flow in market with the video-audio playing device, how when playing audiovisual materials, the collocation image specific effect be the emphasis researched and developed of enterprise now.
Common image specific effect is in the majority with development captions special efficacy, wherein amplifies/dwindle representative the most with captions rolling and captions.Yet, when the captions data manifest captions rolling simultaneously and captions amplify/when dwindling effect, video-audio playing device decoding captions data stream, because can adopting, the captions data can change the action of encoding of length coding (VLE) mode, therefore after the decoding, generation includes the captions data of multirow block data, when video-audio playing device carries out demonstration that captions amplify/dwindle effect, can delete the block data of fixed position, amplify the width and the height ratio of not deleted block data, if cooperate the captions rolling effect, the block data of deletion can appear in the display frame because of captions rolling, and the captions data that display frame is shown forms the suddenly big or suddenly small situation of captions, causes the captions data and presents jagged puzzlement, and this has not been inconsistent the user demand of modern user for high-quality product in fact.
Moreover, to be particular about the epoch in high efficiency reaction time and to arrive, enterprise all wishes the utilization minimum of resources when the research and development product, reach best Expected Results, in the hope of providing service to the consumer in the minimum time.
In view of this, how to use the relevant information of captions data, detecting real-time captions rolling information, to reduce the time cost of detecting captions rolling information, make the medium audience not because of the detecting captions rolling, and make when viewing and admiring audiovisual materials the situation that produces playout-delay, and can obtaining by captions rolling information, make video-audio playing device show simultaneously captions rolling and captions amplify/when dwindling effect, avoid reading of the block data of deleting, the block data that makes deletion reduces the captions data and forms the suddenly big or suddenly small situation of captions not because of captions rolling appears in the display frame, and a kind of devices and methods therefor of detecting real-time captions rolling is proposed, can solve the above problems.
Summary of the invention
Main purpose of the present invention, be to provide a kind of devices and methods therefor of detecting real-time captions rolling, it is providing of the first captions compression data and the second captions compression data thus, the less compression data of data quantity of detecting, thus, the detecting time of required cost is shortened relatively, learning the scrolling information of captions in real time, and effectively save the detecting waste of time.
Secondary objective of the present invention, be to provide a kind of devices and methods therefor of detecting real-time captions rolling, it is providing of captions decoding unit, this receiving element and this detecting module thus, compare the first captions compression data and the second captions compression data, learn that this second captions data is a captions effect that scrolls up, a captions effect or a captions rolling side-play amount of rolling downwards, captions rolling information obtains thus, reduce the captions data and present jagged situation generation, increase the playback quality of viewing and admiring joyful degree and captions data.
Reach advantage in order to achieve the above object, the devices and methods therefor of a kind of detecting real-time captions rolling of the present invention, its exposure comprises a captions decoding unit, decipher captions data stream, obtain one first captions compression data and one second captions compression data, with produce to one first captions data that should the first captions compression data with to one second captions data that should the second captions compression data; One receiving element, receive this first captions compression data and this second captions compression data of this captions decoding unit: and a detecting module, detect this first captions compression data and this second captions compression data, learn a side-play amount, to judge a captions rolling information of this second captions data, because the present invention is with captions compression data foundation as a comparison, the data quantity of required comparison is less than the captions data of decoding, therefore can effectively save the comparison waste of time, in addition, take place by obtaining of captions rolling information, increase the playback quality of viewing and admiring joyful degree and captions data to reduce the suddenly big or suddenly small situation of captions data.
Description of drawings
Fig. 1: be the calcspar of detecting real-time captions rolling device of the present invention;
Fig. 2: be the calcspar of another detecting real-time captions rolling device of the present invention;
Fig. 3: be the schematic diagram of buffer storing subtitling compression data of the present invention;
Fig. 4: be the flow chart of detecting real-time captions rolling method of the present invention; And
Fig. 5: be the calcspar that is used for digital medium player of the present invention.
The figure number explanation
2 storage elements, 4 captions decoding units, 6 captions frame buffers
8 receiving elements, 80 first buffers
800,802,804,806,808,810 start addresss
801 first block compression datas, 803 second block compression datas
805 the 3rd block compression datas 807 the 4th block compression data
809 the 5th block compression datas 811 the 6th block compression data
82 second buffers 820,822,824,826,828 start addresss
821 first block compression datas, 823 second block compression datas
825 the 3rd block compression datas 827 the 4th block compression data
829 the 5th block compression datas, 10 detecting modules
100 first comparing units, 102 counting units
104 second comparing units, 106 acquisition units
12 storage elements, 14 data string separative elements
16 video decoding unit, 18 captions decoding units
20 video signal buffers, 22 captions frame buffers
24 receiving elements, 26 detecting modules
28 superimposed unit
Embodiment
See also Fig. 1, it is an embodiment of the device of detecting real-time captions rolling of the present invention, comprise a captions decoding unit 4 in this embodiment, in order to decipher captions data stream, obtain one first captions compression data and one second captions compression data, to produce to one first captions data that should the first captions compression data and to one second captions data that should the second captions compression data; One receiving element 8 receives the first captions compression data and the second captions compression data of these captions decoding unit 4 decodings; And a detecting module 10, detect the first captions compression data and the second captions compression data that this receiving element 8 receives, learn a side-play amount, to judge a captions rolling information of this second captions data.
Please consult Fig. 1 again, more including a storage element 2 in this embodiment provides this captions data to flow in this captions decoding unit 4, to decipher action; An and captions frame buffer 6, the first captions data and the second captions data in order to temporary these captions decoding unit 4 decodings, module 10 to be detected offers a superimposed unit with this first captions data and the second captions data after finishing the detecting action of the captions rolling information of carrying out this second captions data again.
The above-mentioned first captions compression data of mentioning and the second captions compression data, it includes multirow block compression data respectively, this multirow block compression data of these detecting module 10 these first captions compression datas of detecting is this multirow block compression data of the second captions compression data therewith, in order to learn this side-play amount, to judge the captions rolling information of this second captions data compared to this first captions data, because the data quantity of captions compression data is less, so can effectively save the detecting waste of time, reach the purpose of detecting real-time captions rolling.
See also Fig. 2, it is the calcspar of another detecting captions rolling device of the present invention, receiving element 8 of the present invention includes one first buffer 80 and one second buffer 82 in this another embodiment, this first buffer 80 is in order to the multirow block compression data of temporary this first captions compression data, and this second buffer 82 is in order to this multirow block compression data of temporary this second captions compression data; And this detecting module 10 includes one first comparing unit 100, its be in regular turn relatively this multirow block compression data of this first captions compression data be positioned at first buffer 80 address at the beginning therewith the multirow block compression data of the second captions compression data be positioned at the address at the beginning of second buffer 82; One counting unit 102, include a counter, the block compression data that the start address that is positioned at first buffer 80 in order to the block compression data that writes down this second captions compression data equals this first captions compression data continuously is positioned at the number of times of the start address of second buffer 80; One second comparing unit 104, in order to compare the value and a threshold value of this counter, for judging whether this second captions data has the captions rolling effect, wherein, the Rule of judgment of this threshold value in order to determine whether this second captions data has the captions rolling effect; An and acquisition unit 106, if this second comparing unit 104 is judged when the second captions data has the captions rolling effect, then relatively the start address at the block compression data place of first this first captions compression data equals the start address at the block compression data place of this second captions compression data, in order to capture this start address as this side-play amount, to judge the captions rolling information of the second captions data, wherein, this captions rolling information can be a captions effect that scrolls up, one captions effect of rolling downwards or a captions rolling side-play amount of the second captions data for this reason.
Embodiment by Fig. 1 and Fig. 2 can learn, the present invention is according to this first captions compression data providing of the second captions compression data therewith, to detect the captions rolling information of this second captions data compared to this first captions data, because the data quantity of captions compression data is less, the detecting time of required cost shortens many relatively, therefore can learn the scrolling information of captions in real time, and effectively save the detecting waste of time.
Below provide an embodiment, to further specify the execution work of each unit of the present invention.See also Fig. 3, it is the schematic diagram of buffer storing subtitling compression data of the present invention, as shown in the figure, this receiving element 8 includes this first buffer 80 second buffer 82 therewith, when receiving element 8 receives the first captions compression data that captions decoding units 4 provide and the second captions compression data, the multirow block compression data that can in regular turn the first captions compression data be comprised is deposited in first buffer 80, promptly temporary one first block compression data 801, one second block compression data 803, one the 3rd block compression data 805, one the 4th block compression data 807, block compression datas such as one the 5th block compression data 809 and one the 6th block compression data 811, and in regular turn the multirow block compression data of the second captions compression data is temporary in second buffer 82, promptly temporary one first block compression data 821, one second block compression data 823, one the 3rd block compression data 825, block compression datas such as one the 4th block compression data 827 and one the 5th block compression data 829, the mode of these receiving element 8 scratch block compression datas is for depositing the first block compression data 801 in the 0th address of first buffer 80, after depositing, next address by the first block compression data, 801 shared addresses plays the temporary second block compression data 803, and the rest may be inferred to keep in the block compression data that the first captions compression data and the second captions compression data are comprised.
Wherein, each row block compression data includes at least one sub-block compression data, and when this captions decoding unit 4 is obtained the second captions compression data of block compression data of the first captions compression data of the block compression data that comprises multirow and multirow, can decipher the sub-block compression data of each row block compression data in regular turn, to produce the captions data of corresponding sub-block compression data in regular turn.
To be 4 below with threshold value, the value of counter is 0 for example, first comparing unit 100 of this detecting module 10 relatively multirow block compression data of these first captions compression datas start address of being positioned at first buffer 80 multirow block compression data of whether equaling the second captions compression data is positioned at the start address of second buffer 82, according to regular one: if the first block compression data 801 of this first captions compression data is positioned at the start address 800 of first buffer 80 is positioned at second buffer 82 greater than the first block compression data 821 of the second captions compression data start address 820, afterwards, then relatively the first block compression data 801 of this first captions compression data start address 800 that the is positioned at first buffer 80 second block compression data 823 that whether equals the second captions compression data be positioned at the start address 822 of second buffer 82; According to regular two: if the first block compression data 801 of this first captions compression data is positioned at the start address 800 of first buffer 80 is positioned at second buffer 82 less than the first block compression data 821 of the second captions compression data start address 820, afterwards, then relatively the second block compression data 803 of this first captions compression data start address 802 that the is positioned at first buffer 80 first block compression data 821 that whether equals the second captions compression data is positioned at the start address 820 of second buffer 82, the rest may be inferred, to carry out the contrast action of each block compression data.
Please consult Fig. 3 again, this first comparing unit 100 is when relatively the first block compression data 801 of the first captions compression data start address 800 that the is positioned at first buffer 80 first block compression data 821 that equals the second captions compression data is positioned at the start address 820 of second buffer 82, the value of counting unit 102 summary counters, and more relatively the second block compression data 803 of this first captions compression data start address 802 that the is positioned at first buffer 80 second block compression data 823 that whether equals the second captions compression data be positioned at the start address 822 of second buffer 82, the start address 802 that is positioned at first buffer 80 because of the second block compression data 803 of the first captions compression data is positioned at the start address 822 of second buffer 82 less than the second block compression data 823 of the second captions compression data, represent that the multirow block compression data of the first captions compression data does not equal the multirow block compression data of the second captions compression data continuously, then to reset the value of counter be 0 to this counting unit 102, then, the second block the compression data 823 whether start address 804 that the 3rd block compression data 805 of comparing the first captions compression data again is positioned at first buffer 80 equals the second captions compression data is positioned at the start address 822 of second buffer 82, the start address of cause two block compression datas equates, the value of counting unit 102 summary counters of detecting module 10, then, the value of second comparing unit, 104 these counters of comparison of use detecting module 10 is threshold value therewith, because the value of this counter is less than this threshold value, the block compression data of representing the first captions compression data equals that the number of times of block compression data of the second captions compression data is still not enough judges whether this second captions data has the captions rolling effect, then more relatively the 4th block compression data 807 of the first captions compression data start address 806 that is positioned at first buffer 80 the 3rd block compression data 825 that whether equals the second captions compression data be positioned at the start address 824 of second buffer 82, by that analogy, when the value of this counter equals this threshold value, can judge that this second captions data has the captions rolling effect.
Therefore, the 3rd block compression data 805 when the first captions compression data, the 4th block compression data 807, the 5th block compression data 809 and the 6th block compression data 811 are positioned at the start address 804 of first buffer 80,806,808,810 equal the second block compression data 823 of this second captions compression data respectively, the 3rd block compression data 825, the 4th block compression data 827 and the 5th block compression data 829 are positioned at the start address 822 of second buffer 82,824,826,828 o'clock, the value of this counter is accumulated as 4 and equal threshold value, can judge that then this second captions data has the captions rolling effect, afterwards, the start address at the block compression data place of acquisition unit 106 comparisons first this first captions compression data equals the start address at the block compression data place of this second captions compression data, to capture this start address as this side-play amount, promptly relatively the start address 804 at the 3rd block compression data 805 places of this first captions compression data start address 822 that equals the second block compression data, 823 places of the second captions compression data is 3, learns that this side-play amount is 3.
In the process of comparison, can learn that first identical start address is the start address 822 that the second block compression data 823 that start address 804 that the 3rd block compression data 805 of the first captions compression data is positioned at first buffer 80 equals the second captions compression data is positioned at second buffer 82, can judge that thus this captions rolling information is a captions effect that scrolls up, otherwise, if the start address 802 that first identical start address is the second block compression data 803 of the first captions compression data is positioned at first buffer 80 equals the start address 824 that the 3rd block compression data 825 of the second captions compression data is positioned at second buffer 82, can judge that then this captions rolling information is a captions effect of rolling downwards.
Fig. 4 is the flow chart of detecting real-time captions rolling method of the present invention, in this embodiment, at first, decipher captions data stream via step S10, obtain one first captions compression data and one second captions compression data, and produce to one first captions data that should the first captions compression data with to one second captions data that should the second captions compression data, then, see through step S14 and receive this first captions compression data second captions compression data therewith, detect the reference frame of the captions rolling information of this second captions data for the above-mentioned detecting module of mentioning, then, detect this first captions compression data second captions compression data therewith by step S16, after judging that this second captions data has the captions rolling effect, obtain a side-play amount, to judge the captions rolling information of this second captions data.
In the above embodiments, produce this first captions data therewith after the second captions data in step S10, more comprise step S12, in order to store this first captions data therewith the second captions data in a captions frame buffer, for a superimposed unit superimposed this first captions data and one first video data and this second captions data, one second video data captions rolling information therewith respectively, then, offer a broadcast unit again, carry out playback action; And the first captions compression data that in step S14, can receive therewith the second captions compression data be temporary in respectively in first buffer and second buffer.
In addition, detecting action for the captions rolling information that further specifies this second captions data, in step S16, more include the following step, at first, in regular turn relatively the multirow block compression data of this first captions compression data be positioned at first buffer start address therewith the multirow block compression data of the second captions compression data be positioned at the start address of second buffer, then, one counter is provided, when the block compression data that the start address that is positioned at first buffer when the block compression data of this second captions compression data equals this first captions compression data continuously is positioned at the start address of second buffer, the value of this counter adds up, the providing of value of this counter is provided, with as the reference information of judging whether this second captions data has the captions rolling effect, then, the value and the threshold value that compare this counter, when the value of this counter equals this threshold value, represent that this second captions data has the captions rolling effect, at last, when relatively the start address at the block compression data place of first this first captions compression data equals the start address at block compression data place of the second captions compression data, capture this start address as this side-play amount, to judge the captions rolling information of this second captions data.
The device of detecting captions rolling of the present invention, it can be used for a digital medium player, detailed content sees also Fig. 5, it is the calcspar of digital medium player of the present invention, this device comprises a storage element 12, the audiovisual materials of one utilization MPEG-2 and MPEG-4 coded format are provided, for example with the DVD disc of MPEG-2 compressed encoding, and a DivX film file with MPEG-4 compression video signal; One data flow point is MPEG image data stream, audio document stream and captions data stream in order to separate these audiovisual materials from the unit 14; This captions data stream of one captions decoding unit 18 decoding, obtain one first captions compression data and one second captions compression data and generation to one of should the first captions compression data the first captions data and to one of should the second captions compression data the second captions data; The first captions data and the second captions data of 22 temporary these captions decoding unit 18 decodings of one captions frame buffer; One receiving element 24 receives this first captions compression data second captions compression data therewith; And the first captions compression data and the second captions compression data of a detecting module 26 these receiving elements 24 of detecting, learn a side-play amount, to judge a captions rolling information of this second captions data.
Wherein, after this detecting module 26 is learnt this captions rolling information, the present invention further provides a superimposed unit 28, in order to receive a video decoding unit 16 temporary first video data and one second video data one of deciphered in a video signal buffer 20, the captions rolling information that the first captions data of this captions frame buffer 22 and the second captions data and this detecting module 26 are learnt, superimposed this first video signal of difference is the first captions data and this second video signal therewith, this second captions data is captions rolling information therewith, to export a broadcast unit to, carry out playback action.
Above-mentioned detecting module 26 includes one first comparing unit, a counting unit, one second comparing unit and an acquisition unit, and wherein, the execution work of each unit can see the described content of Fig. 2 for details.
The devices and methods therefor of detecting real-time captions rolling of the present invention can be realized by carrying out firmware, can also be by the real work of logical circuit.
In sum, the present invention is relevant for a kind of devices and methods therefor of detecting real-time captions rolling, it is by the captions decoding unit, providing of receiving element and detecting module, detect the first captions compression data and the second captions compression data, to learn that the second captions data is the captions effect that scrolls up, downward captions effect and captions rolling side-play amount of rolling, because the data quantity of captions compression data is less, so can effectively save the detecting waste of time, and can learn the scrolling information of captions in real time, moreover, by obtaining of captions rolling information, when providing digital medium player to carry out captions simultaneously to amplify/dwindle with the captions rolling special efficacy, avoid reading of the block data of deleting, reduce the captions data and present jagged situation generation, make the medium audience need not bear two special efficacys and exist simultaneously and cause the captions data and present jagged puzzlement, further promote the playback quality of viewing and admiring joyful degree and captions data.
The above, it only is a preferred embodiment of the present invention, be not the scope that is used for limiting the invention process, change and modification according to the described shape of the present patent application claim, structure, feature and spiritual institute are impartial for it such as, all should be included in the present invention's the claim.
Claims (13)
1. the device of a detecting real-time captions rolling is characterized in that, this device comprises:
One captions decoding unit, decipher a subtitle data stream, obtain one first captions compression data and one second captions compression data, with produce to one first captions data that should the first captions compression data with to one second captions data that should the second captions compression data;
One receiving element, it receives this first captions compression data and this second captions compression data of this captions decoding unit, and keeps in the multirow block compression data of this first captions compression data and the multirow block compression data of this second captions compression data in regular turn; And
One detecting module is detected this first captions compression data and this second captions compression data, learns a side-play amount, and to judge a captions rolling information of this second captions data, this detecting module comprises:
One first comparing unit, relatively this multirow block compression data of this first captions compression data this multirow block compression data of being positioned at the address at the beginning of this receiving element and this second captions compression data is positioned at the address at the beginning of this receiving element in regular turn;
One counting unit, comprise a counter, this multirow block compression data that the start address that is positioned at this receiving element in order to this multirow block compression data that writes down this first captions compression data equals this second captions compression data continuously is positioned at the number of times of the start address of this receiving element;
One second comparing unit, the relatively value of this counter and a threshold value are for judging whether this second captions data has the captions rolling effect; And
One acquisition unit, when learning that according to this second comparing unit this second captions data has the captions rolling effect, the start address at this multirow block compression data place of comparison first this first captions compression data equals the start address at this multirow block compression data place of this second captions compression data, to capture this start address as this side-play amount.
2. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, more comprises:
One captions frame buffer is in order to this first captions data and this second captions data of temporary this captions decoding unit.
3. the device of detecting real-time captions rolling as claimed in claim 2 is characterized in that, more comprises:
One superimposed unit, this first captions data that superimposed one first vision signal of difference and this captions frame buffer are temporary and one second vision signal, temporary this second captions data and this captions rolling information of this captions frame buffer are to export a broadcast unit to.
4. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, this receiving element more comprises:
One first buffer, this multirow block compression data of temporary this first captions compression data in regular turn; And
One second buffer, this multirow block compression data of temporary this second captions compression data in regular turn.
5. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, this threshold value is at least 4.
6. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, this captions rolling information can be a captions effect that scrolls up.
7. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, this captions rolling information can be a captions effect of rolling downwards.
8. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, this captions rolling information can be a captions rolling side-play amount of this second captions data.
9. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, more comprises:
One storage element is in order to provide this subtitle data stream.
10. the device of detecting real-time captions rolling as claimed in claim 1 is characterized in that, can be used for a media playing apparatus.
11. the method for a detecting real-time captions rolling is characterized in that, this method comprises the following step:
Decipher a subtitle data stream, obtain one first captions compression data and one second captions compression data, with produce to one first captions data that should the first captions compression data with to one second captions data that should the second captions compression data;
Receive this first captions compression data and this second captions compression data, and keep in the multirow block compression data of this first captions compression data and the multirow block compression data of keeping in this second captions compression data in regular turn in regular turn;
The address at the beginning at this multirow block compression data place of the address at the beginning at this multirow block compression data place of this first captions compression data and this second captions compression data relatively in regular turn;
One counter is provided, when the start address at this multirow block compression data place of this first captions compression data equals the start address at this multirow block compression data place of this second captions compression data continuously, the value of this counter that adds up;
Relatively a value of this counter and a threshold value when the value of this counter equals this threshold value, judge that this second captions data has the captions rolling effect; And
When this second captions data has the captions rolling effect, the start address at this multirow block compression data place of comparison first this first captions compression data equals the start address at this multirow block compression data place of this second captions compression data, to capture this start address, in order to judge a captions rolling information of this second captions data as a side-play amount.
12. the method for detecting real-time captions rolling as claimed in claim 11 is characterized in that, more comprises a step:
Store this first captions data and this second captions data in a captions frame buffer.
13. the method for detecting real-time captions rolling as claimed in claim 11 is characterized in that, more comprises the following step:
This multirow block compression data of temporary this first captions compression data is in one first buffer in regular turn; And
This multirow block compression data of temporary this second captions compression data is in one second buffer in regular turn.
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| Publication number | Publication date |
|---|---|
| CN1645916A (en) | 2005-07-27 |
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