CN1465179A - System for recording and reading audiovisual information - Google Patents
System for recording and reading audiovisual information Download PDFInfo
- Publication number
- CN1465179A CN1465179A CN02802191A CN02802191A CN1465179A CN 1465179 A CN1465179 A CN 1465179A CN 02802191 A CN02802191 A CN 02802191A CN 02802191 A CN02802191 A CN 02802191A CN 1465179 A CN1465179 A CN 1465179A
- Authority
- CN
- China
- Prior art keywords
- audiovisual
- visual information
- equipment
- information stream
- compression
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J1/00—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general
- H03J1/0008—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor
- H03J1/0025—Details of adjusting, driving, indicating, or mechanical control arrangements for resonant circuits in general using a central processing unit, e.g. a microprocessor in a remote control unit
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/765—Interface circuits between an apparatus for recording and another apparatus
- H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J2200/00—Indexing scheme relating to tuning resonant circuits and selecting resonant circuits
- H03J2200/24—Remote control device with display showing program content
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
Abstract
A system (100) comprising a first apparatus (101), which is adapted to store and/or read audiovisual information into or from a memory (112), and a second apparatus (102), which is adapted to control the first apparatus (101). The second apparatus (102) comprises a receiver (132) for receiving audiovisual information from the first apparatus (101), and a display device (124) for displaying the received audiovisual information. To transmit the audiovisual information from the first apparatus (101) to the second apparatus (102) in an efficient way, the audiovisual information is first compressed by a compression unit (115). The invention also relates to methods of compressing the audiovisual information.
Description
The present invention relates to a kind of system, it comprises: be suitable for being stored in the memory to audiovisual/visual information stream and/or read first equipment that audiovisual/visual information flows from memory; And second equipment that is suitable for first equipment of controlling, described second equipment comprises display unit.The invention still further relates to the method that sends and receive audiovisual/visual information stream.
Known a kind of like this system from United States Patent (USP) 5537107.
Such system is provided at the possibility that shows audiovisual/visual information on the remote control of video tape recorder or video camera, so that strengthen the user and come reciprocation between the operated system by remote control.
The problem that exists in this system is, the bandwidth that is stored in the audiovisual/visual information in the memory of video tape recorder for example usually is too big, is difficult to be wirelessly transmitted to remote control.
An object of the present invention is to solve the too big problem of this bandwidth of standard pronunciation image signal.
According to the present invention, this purpose is to realize in having the system of following feature: first equipment comprises the compression unit that was used for before sending audiovisual/visual information stream its compression, and second equipment comprises and is used for the decompression unit that after receiving the audiovisual/visual information stream that first equipment is sent this information flow decompressed.By before sending audiovisual/visual information stream with its compression, it is less that audiovisual/visual information is sent to the required bandwidth of second equipment from first equipment.
Embodiment according to system of the present invention is characterised in that compression unit is suitable for regularly selecting an image from audiovisual/visual information stream.By sending image the audiovisual/visual information stream from video tape recorder to remote control, make the image that information flow comprised of generation be less than original audiovisual/visual information stream according to certain cycle.Therefore, it is less to send to the information of second equipment from first equipment.
Another embodiment according to system of the present invention is characterised in that described compression unit is suitable for the further selected image of compression.When image itself is compressed and is used as separate picture when first equipment sends to second equipment, the complexity of second equipment can reduce.This is feasible, because the decompression that the decompression of image does not have the audiovisual/visual information of compression to flow is so complicated.Another advantage is, it is too high that the complexity of second equipment can not become, and also having an advantage simultaneously is that second equipment is than the easier processing of complex device.This has an advantage to be again, and it makes the use of described system more convenient.
The method according to this invention is characterised in that, first equipment compression audiovisual/visual information stream, and second equipment decompresses to the audiovisual/visual information stream of encoding.
These and other aspect of the present invention is illustrated and can therefrom be become apparent with reference to following embodiment.
Among the figure:
Fig. 1 represents the embodiment according to system of the present invention,
Fig. 2 represents to illustrate the image of the first method of compressing audiovisual/visual information,
Fig. 3 represents to illustrate the image of the second method of compressing audiovisual/visual information.
Fig. 1 represents the system 100 as possibility embodiment of the present invention.Described system 100 comprises video tape recorder 101 and remote control 102.In the embodiment shown, video tape recorder 101 is digital VTRs, but can change analog vtr in another embodiment.In addition, device 101 can be a video camera.The user can operate video tape recorder by the input unit on the remote control 102 121.Input unit 121 can comprise key-press matrix, but also can change touch-screen into.Remote control 102 also comprises first transmitter 122 that is used for the instruction that provides by input unit 121 is sent to via first signal 131 video tape recorder 101.In video tape recorder 101, receive instruction by first receiver 114.
For the reciprocation of enhanced system 100 with the user, and improve the convenience of using, remote control 102 comprises in order to show the display unit 124 of audiovisual/visual information.Shown in the embodiments of the invention, display unit 124 is LCD screens, so that the volume and weight of restriction remote control 102.The user can show audiovisual/visual information on display unit 124, it with in that to be connected to the audiovisual/visual information that shows on other display unit of connector 116 different.When processor 111 can be when memory 112 reads a plurality of audiovisual/visual informations stream, this is feasible.Situation in the illustrated embodiment of the invention that Here it is.
Bestly be, when the user want to utilize the speical play pattern, such as F.F. known to those skilled in the art with when fasting rewind from memory 112 the search audiovisual/visual information, also have other user simultaneously for example during the film on watching another display unit that is connected on the connector 116, can show on the display unit 124 with another display unit on the different audiovisual/visual information of audiovisual/visual information that shows.
In order on display unit 124, to show audiovisual/visual information, audiovisual/visual information is sent to remote control 102 from video tape recorder 101.In the illustrated embodiment of the invention, video tape recorder 101 is digital VTRs, and the audiovisual/visual information of storage has the MPEG2 form in the memory 112.But this can be different form, and perhaps the audiovisual/visual information in the memory 112 can be fully without compression, and this does not depart from the scope of the present invention.As mentioned above, being connected between video tape recorder 101 and the remote control 102 is wireless, and communicating by letter between video tape recorder 101 and the remote control 102 realizes via first signal 132.This is an infrared signal in the illustrated embodiment of the invention.
The audiovisual/visual information stream of MPEG2 form needs at least, and the bit rate of 4Mb/s reaches the PAL quality.The Maximum Bit Rate of 4Mb/s by infrared connection is feasible for synchronous connection and IrDA agreement, but the distance between the transmitter and receiver should be no more than 30 centimetres.In this case, supposed that remote control is considered to low-power device.Reason is that macrocell makes remote control be not easy to handle, and this is a cost with its ease of use.Described restriction about distance is undesirable in an embodiment according to the present invention, because this can diminish the convenience of use.
If guarantee the reasonable useful life of the battery of remote control, then had better not send to remote control 102 to the audiovisual/visual information of MPEG2 form PAL quality stream from video tape recorder 101.Because audio-video information is stored in the memory 112 of video tape recorder 101 with this form in the illustrated embodiment of the present invention, so before by means of infrared signal 132 this information being sent to remote control 102, further compress this information.
In the embodiment shown, video tape recorder 101 comprises the compression unit 115 that is used to compress audiovisual/visual information.The resolution of viewable portion that can be by reducing audiovisual/visual information is compressed audiovisual/visual information.In Fig. 2, the original visual information of first image, 201 expressions, the visual information after the 202 expression compressions of second image is wherein compressed the viewable portion of audiovisual/visual information by reducing resolution.
Compression can also be carried out like this: regularly select the frame in the viewable portion of audiovisual/visual information, and this frame is sent to remote control 102 (Fig. 2) as image from video tape recorder 101 (Fig. 1).This illustrates in Fig. 3.Among this figure, the unpressed audiovisual/visual information stream of first sequence, 301 expressions, the audiovisual/visual information stream of second sequence, 302 expression compressions.The compression method of representing among Fig. 3 is selected a frame in per two frames from audiovisual/visual information stream, make data volume reduce by half.For example, in comprising first sequence 301 of five frames, be that second sequence 302 is selected first frame 311 and the 3rd frame 313 and the 5th frame 315.Non-selected second frame 312 and the 4th frame 314.Like this, second sequence 302 is as the compressed version of first sequence 301, comprises the 6th frame 321 corresponding to first frame 311 of first sequence 301, corresponding to second frame 322 of the 3rd frame 313 of first sequence 301 and corresponding to the 3rd frame 323 of the 5th frame of first sequence 302.
Also may send to remote control 102 (Fig. 1) before at audiovisual/visual information from video tape recorder 101 (Fig. 1) subsequently, for example the image of selecting itself be compressed according to Joint Photographic Experts Group known to those skilled in the art with above-mentioned compression.The transmission separate picture has the following advantages: with decompress and compare according to the audiovisual/visual information of MPEG2 standard compression, according to Joint Photographic Experts Group to compressed image decompress needs hardware still less.The audiovisual/visual information of compression is sent to remote control 102 (Fig. 1),, it must be decompressed again at this.For the ease of using, preferably use simple remote control.Therefore, it is favourable the viewable portion of audiovisual/visual information being sent to remote control 102 (Fig. 1) with the form of separate picture from video tape recorder 101 (Fig. 1).
State that as top in illustrated embodiment of the present invention, audiovisual/visual information is stored in the memory 112 with the MPEG2 form of PAL quality.The other method of compressed information is according to the different compression standards that can obtain the high compression factor more, compresses audiovisual/visual information as MPEG4.If this method combines with the method for the viewable portion of other illustrated compression audiovisual/visual information, then can obtain big compression ratio.
Can also for example compress acoustic information according to MP3 standard known to those skilled in the art.
Fig. 1 represents that also video tape recorder 101 comprises second transmitter 113 that the audiovisual/visual information by compression unit 115 compressions is sent to remote control 102.In illustrated embodiment of the present invention, send audiovisual/visual information by means of infrared signal 132, but it will be apparent to those skilled in the art that and to adopt radio signal according to Bluetooth protocol.
In a word, the present invention relates to system 100 (Fig. 1), it comprises and is suitable for audiovisual/visual information is stored in first equipment 101 (Fig. 1) that reads audiovisual/visual information in the memory 112 and/or from memory 112; And second equipment 102 (Fig. 1) that is suitable for first equipment 101 (Fig. 1) of controlling.Described second equipment 102 (Fig. 1) comprises and is used for the display unit 124 (Fig. 1) that receives the receiver 132 (Fig. 1) of audiovisual/visual information and be used to show the audiovisual/visual information of reception from first equipment 101 (Fig. 1).In order to send audiovisual/visual information effectively to second equipment 102 (Fig. 1), at first audiovisual/visual information is compressed by compression unit 115 (Fig. 1) from first equipment 101 (Fig. 1).The invention still further relates to the method for compression audiovisual/visual information.
Claims (11)
1. a system (100), it comprises:
First equipment (101), it is suitable for being stored in the memory (112) to audiovisual/visual information stream and/or reads audiovisual/visual information stream from memory (112), and described first equipment comprises the transmitter (113) that is suitable for sending described audiovisual/visual information stream; And
Be suitable for controlling second equipment (102) of described first equipment (101),
Described second equipment comprises:
Be suitable for receiving the receiving system (123) of the audiovisual/visual information stream that sends by described first equipment,
Be suitable for showing the display unit (124) of at least a portion of the audiovisual/visual information stream that is received,
It is characterized in that:
Described first equipment (101) comprises the compression unit (115) that was used for before sending described audiovisual/visual information stream its compression; And
Described second equipment comprises and is used for the decompression unit (125) that after receiving the audiovisual/visual information stream that described first equipment (101) sends described information flow decompressed.
2. the system as claimed in claim 1 is characterized in that: described compression unit (115) is suitable for reducing the resolution of the viewable portion of described audiovisual/visual information stream.
3. the system as claimed in claim 1 is characterized in that: described compression unit (115) is suitable for regularly selecting image from described audiovisual/visual information stream.
4. system as claimed in claim 3 is characterized in that: described compression unit (115) is suitable for further compressing selected image.
5. the system as claimed in claim 1 is characterized in that: described compression unit (115) is suitable for the audiovisual/visual information stream that further compression had been compressed.
6. the system as claimed in claim 1, it is characterized in that: described second equipment (102) has the output (126) that is used for acoustic information.
7. one kind sends and receive the method that audiovisual/visual information flows, and this method adopts the system that comprises following equipment: first equipment (101) is suitable for sending audiovisual/visual information stream; And second equipment (102), be suitable for receiving described audiovisual/visual information stream, it is characterized in that:
The described audiovisual/visual information stream of described first equipment (101) compression, and
Described second equipment (102) decompresses to the audiovisual/visual information stream through coding.
8. method as claimed in claim 7 is characterized in that: compression comprises the step of the resolution that reduces described audiovisual/visual information stream.
9. method as claimed in claim 7 is characterized in that: compression comprises regularly selects image from described audiovisual/visual information stream.
10. method as claimed in claim 9 is characterized in that: compression comprises the step of compressing selected image.
11. method as claimed in claim 7 is characterized in that: compression comprises the step of the audiovisual/visual information stream that further compression had been compressed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP01201578 | 2001-05-01 | ||
| EP01201578.0 | 2001-05-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1465179A true CN1465179A (en) | 2003-12-31 |
Family
ID=8180233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02802191A Pending CN1465179A (en) | 2001-05-01 | 2002-04-24 | System for recording and reading audiovisual information |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR20040000313A (en) |
| CN (1) | CN1465179A (en) |
| WO (1) | WO2002089475A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301345A (en) * | 2021-05-27 | 2021-08-24 | 苏州山梨酱传媒科技有限公司 | System for recording and reading audio-video information |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857898A (en) * | 1987-12-09 | 1989-08-15 | North American Philips Consumer Electronics Corp. | Data compression technique for reconfigurable remote control apparatus |
| JPH01175490A (en) * | 1987-12-29 | 1989-07-11 | Fujitsu General Ltd | Remote control equipment with headphone |
| JP3318897B2 (en) * | 1991-01-29 | 2002-08-26 | ソニー株式会社 | Remote controller with video monitor |
| US6496122B2 (en) * | 1998-06-26 | 2002-12-17 | Sharp Laboratories Of America, Inc. | Image display and remote control system capable of displaying two distinct images |
| JP2000069421A (en) * | 1998-08-26 | 2000-03-03 | Olympus Optical Co Ltd | Electronic album |
| JP2000270386A (en) * | 1999-03-12 | 2000-09-29 | Matsushita Electric Ind Co Ltd | System and device main body for digital broadcast reception reproduction and remote controller |
| JP2000330529A (en) * | 1999-05-20 | 2000-11-30 | Fujitsu General Ltd | Picture selection/display method |
-
2002
- 2002-04-24 KR KR1020027018073A patent/KR20040000313A/en not_active Application Discontinuation
- 2002-04-24 CN CN02802191A patent/CN1465179A/en active Pending
- 2002-04-24 WO PCT/IB2002/001488 patent/WO2002089475A2/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301345A (en) * | 2021-05-27 | 2021-08-24 | 苏州山梨酱传媒科技有限公司 | System for recording and reading audio-video information |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20040000313A (en) | 2004-01-03 |
| WO2002089475A2 (en) | 2002-11-07 |
| WO2002089475A3 (en) | 2003-02-13 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |