CN200953634Y - Multiple digital data flow outputting device - Google Patents
Multiple digital data flow outputting device Download PDFInfo
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- CN200953634Y CN200953634Y CN 200620132360 CN200620132360U CN200953634Y CN 200953634 Y CN200953634 Y CN 200953634Y CN 200620132360 CN200620132360 CN 200620132360 CN 200620132360 U CN200620132360 U CN 200620132360U CN 200953634 Y CN200953634 Y CN 200953634Y
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Abstract
The utility model discloses a multiplex digital data flow output device to provide a plurality of digital data flow outputs, which can combine a plurality of digital data flows with varied definitions and compression ratios according to network bandwidth and demands of different users, temporarily store the digital data flows as above into a memory and synchronously transmit digital data flows in light of network bandwidth and demands of different users to conveniently support more different applications.
Description
Technical field
The utility model relates to a kind of device of digital data stream output, especially refers to a kind of device of multiplicity digital data streams output.
Background technology
In recent years, the transfer of data on the network develops at present more and more general multi-media network transmission by early stage lteral data transmission.Along with computer network and multimedia flourish, image and video video coding technique become the theme of popular research, audio and video information transmits by internet and wireless network, but because of being subjected to the restriction of frequency range, makes the quality of image transmission quality depend on the quality of coding techniques.
The compression of data and digitlization make the video-audio data can be easily in transmission over networks, the more and more polynary change of the function of digitized video product in the market and how combining with network, network monitoring video camera (Network IP Camera) as supervisory control system, (the Set-top box of box on the teaching machine, STB), media product such as mobile phone or even digital camera, the video-audio data that wherein compressed is sent to any corner, the world by network, makes the amusement of enjoyment audio-visual multimedia become and is more prone to.
Usually the video-audio data amount all is very huge, and the frequency range of network is limited, therefore is necessary suitably data compression so that quicker in transmission over networks.
The compression standard of MPEG (Moving Picture Exports Group) is by (the International Telecommunications Union of International Telecommunications Union, ITU) with (the InternationalStandard Organization of International Standards Organization, ISO), formulate the standard of compressed video and audio frequency of being used for, and make standards such as MPEG-1, MPEG-2 and MPEG-4 successively, now become the major technique of present video compression.The compression ratio of mpeg audio compression standard such as MPEG-1 layer I (MP1) and MPEG-1 layer II (MP2) was respectively 4: 1 and 6: 1-8: 1, and MPEG-1 layer III is exactly the MP3 compression standard that is commonly called as, its compression ratio is then up to 10: 1-12: 1.
Sound is interrogated the different of signal and signal of video signal maximum, is that image is the 2D signal that the time is launched, and sound then is the one-dimensional signal that the time is launched.The basic framework of MPEG video and audio compression is earlier the continuous signal or the action of nature to be carried out sample of signal (sampling), be divided into block processing such as (block).Then data compression normally reaches this purpose by the conversion (Transform) and (Quantization) process of quantification.Conversion is meant the process that data is forwarded to frequency domain (frequency domain) by spatial domain (spatial domain) or time-domain (time domain).This conversion generally is that (DiscreteCosine Transform DCT) does conversion with discrete cosine transform.And quantizing process is high-frequency signal is filtered out, to reach the effect of data reduction.
JPEG (Joint Photographic Experts Group) is the compression standard of ISO (International StandardizationOrgnization) and CCITT (Consultative Committee Of the Internation Telephoneand Telegraph) the static continuous tone modulation that develops out, and JPEG baseline (baseline) algorithm can be divided into roughly: sampling, discrete cosine transform, quantification and entropy coding.In JPEG, can be with the data that encode, sampling is divided into several block, and each block just is called minimum program code unit.Wherein separate cosine transform, image is changed to frequency domain by spatial domain.And the loss characteristic of JPEG baseline produces in quantizing process, is used for rejecting information unnecessary in the image, quantizes to help the main compressive features of JPEG.Last JPEG has stipulated the method for two kinds of entropy codings: huffman coding and arithmetic coding.What baseline continuous number signal coder was used is huffman coding, is a kind of at the photograph image and widely used a kind of distortion compression standard method.
By the compression standard of above-mentioned MPEG video, audio compress standard and JPEG, after signal was through steps such as sampling, cutting block and quantifications, unavoidable meeting was different with original signal, and is a kind of distortion compression method.
Fig. 1 is a kind of network monitoring video camera transmits video-audio data by network a schematic diagram.Network monitoring video camera 101 with reference to figure 1, with sound and the image archives that compressed, pass to a distant place by network 103, the user can easily use remote personal computer and near-end personal computer 105, mobile phone 107, personal digital assistant (Personal Digital Assistant, PDA) 108 video-audio datas such as decompression such as equipment such as grade stream, the video-audio data that can online use browser browse network monitoring camera transmits carries out remote monitoring.Have the network monitoring video camera that JPEG, MPEG1/2/4 etc. use different compression methods at present on the market, to adapt to the network bandwidth restriction.The big advantage that the network monitoring video camera is had compared with the traditional analog monitoring camera also can be stored in image data in the storage facilities as hard disk 110, network storage equipment (Network Attached Storage, NAS) 111.Network storage equipment 111 is network storage equipments of a very convenient use, not only can store sizable data volume and installation easily.
It is to allow a plurality of long-range users to use browser simultaneously that the network monitoring video camera also has a function, browses monitored picture.If the resolution (resolution) of a certain long-range user's changed network video camera, for example image is changed into 320 * 240 sizes from 640 * 480 sizes, the esolving degree that then can cause long-range all users all changes to 320 * 480 sizes from 640 * 480, and the image resolution that is stored in hard disk is even also changed.
The employed compression chip of network camera can't be exported the packed data of different resolution or different compression ratio (compression ratio) simultaneously at user's demand or different application at present.Usually network storage equipment need store high-resolution image frame and be beneficial to identification, and as the picture of 640 * 480 sizes, mobile phone then is subject to network bandwidth and mobile phone screen size, can only receive the picture of 320 * 240 even 160 * 120 sizes.
The compression chip design of the manufacturer of IC design at present is single digital data stream output.Though before data output, can select the compressed format of different compression ratio and different resolution, can only export the packed data of a kind of compression ratio or resolution at every turn.
Therefore, be necessary to provide a kind of device that can select the packed data form of different compression ratios and different resolution simultaneously, to adapt to different users's different demands or application.
Fig. 2 is a kind of schematic diagram of classical signal distortion coded system.With reference to figure 2, this classical signal coded system mainly can be divided into four unit: data processing unit 201, quantifying unit 203, coding unit 205 and internal storage location 207.Signal processing unit 201 main analyses and processing signals are originated and are converted primary signal to be fit to quantification signal kenel, comprise sampler 201a, block cutter 201b and quadrature transcriber 201c.Quadrature transcriber 201c comprises as discrete cosine transform, discrete wavelet conversion (Discrete Wavelet Transform, DWT), KLT (Karhunen-Loeve Transform) conversion etc., purpose is to change territory (as frequency domain) arriving in the signal transformation of spatial domain, and represents with conversion coefficient.
Quantifying unit 203 comprises quantizer 203a and quantization table (quantization table) 203b.When the element value in the quantization table 203b was smaller, compression ratio can be lower, and relatively the quality of image is relatively good.On the contrary, when the element value in the quantization table 203b was bigger than normal, then compression ratio can be than higher, but the quality of image is relatively poor.
The 545th, No. 827 patent disclosure in tw Taiwan a kind of framework that reduces digital display digital image data transmitted data amount, it has digitized video and sequential control unit, is used for the reception or the transmission of control figure image data.
The 390th, No. 097 patent disclosure in tw Taiwan a kind of image compressibility of selecting compression ratio, this system adjusts the quantization step of quantizer among the JPEG by a kind of method that detects the image complexity, thereby keeps image quality and adjust compression ratio.
The 566th, No. 047 patent disclosure in tw Taiwan a kind of transcoder of multiple speed digital data stream, from a common carry-out bit data flow, produce the bit data stream of the multiple recompile of a plurality of different rates.
The utility model content
In view of the single output problem of above-mentioned conventional digital data flow, the utility model provides a kind of multiplicity digital data streams output device, and this device provides a plurality of different digital data streams to export simultaneously.
This device is handled the signal data that comprises sound and image data, and after steps such as data processing and quantization encoding, unavoidable meeting is different with original signal, so be a kind of distortion compression set.
This device comprises data processing unit, selector unit and quantization encoding unit, and data processing unit produces the signal data of various different resolutions.Selector unit distributes combination to export the quantization encoding unit to the signal data of various different resolutions, can produce the signal data of various different compression ratios according to the element numerical value in the quantization table.
This device further has enough internal memories with store digital data, and according to the suitable numerical data of demand output.
Along with the progress of semiconductor industry, the brilliant unit that can put in a single-chip is more and more, and size is then more and more littler.Therefore, multiplicity digital data streams output device of the present utility model also can be realized on a single-chip.
Compared with prior art, the utlity model has following advantage:
The utility model can come the digital data stream of a plurality of different resolutions of combination results and compression ratio according to network bandwidth and different users's demand, and the digital data stream of a plurality of different resolutions and compression ratio is temporary in the internal memory, and according to its network bandwidth and different users's demand carry digital data streams data simultaneously, thereby conveniently support how different application.
Description of drawings
Fig. 1 is the schematic diagram of explanation network monitoring video camera by network transmission data.
Fig. 2 is a classical signal coded system schematic diagram.
Fig. 3 is the schematic diagram of the utility model multiplicity digital data streams output device.
Fig. 4 is first embodiment of the utility model multiplicity digital data streams output device.
Fig. 5 is second embodiment of the utility model multiplicity digital data streams output device.
The primary clustering symbol description is as follows:
101 network monitoring video cameras, 103 networks
105 personal computers, 107 mobile phones
108 personal digital assistants, 110 hard disks
111 network storage equipments
201 data processing unit 201a samplers
203 quantization encoding unit
207 internal storage locations
301 data processing unit 301a samplers
303 selector unit, 305 quantization encoding unit
309 output units
401 data processing unit 401a samplers
405 quantization encoding unit
405a, 405b, 405c quantization table
405d, 405e, 405f quantizer
405g, 405h, 405i encoder
The image data of 407a 640 * 480 low compression ratios
The image data of compression ratio among the 407b 640 * 480
The image data of 407c 640 * 480 high compression ratios
501 data processing units, 505 quantization encoding unit
505a, 505b, 505c quantization table
505d, 505e, 505f quantizer
505g, 405h, 505i encoder
The image data of 507a 640 * 480 low compression ratios
The image data of compression ratio among the 507b 320 * 240
The image data of 507c 160 * 120 high compression ratios
Embodiment
Fig. 3 is a schematic diagram of the utility model multiplicity digital data streams output device.With reference to figure 3, this multiplicity digital data streams output device comprises data processing unit 301, selector unit 303, quantization encoding unit 305, internal storage location 307 and output unit 309.
Have one or more sampler 301a, block cutter 301b and quadrature transcriber 301c in the data processing unit 301, handle the signal data of input and produce a plurality of sampling translation data, wherein a plurality of sampling translation data have further comprised the data of a plurality of different resolutions.
Fig. 4 is the multiplicity digital data streams output device of the utility model first embodiment.With reference to figure 4, this device comprises data processing unit 401, selector unit 303, quantization encoding unit 405, internal storage location 307 and output unit 309.
In other words, image data is by the sampling translation data of 640 * 480 resolution of data processing unit 401 outputs, directly be sent to after quantization encoding unit 405 makes quantization encoding and handle by selector unit 303, the quantization encoding data of three 640 * 480 resolution of output and different compression ratios are also temporary to internal storage location 307.Comprising the image data 407b of compression ratio among the image data 407a, 640 * 480 of 640 * 480 low compression ratios and the image data 407c of 640 * 480 high compression ratios.
Detect long-range users' network bandwidth and quantization encoding data that demand reads internal storage location 307 by output unit 309 at last and transfer on the network.Wherein the image data 407b of the output unit 309 image data 407c that can transmit 640 * 480 high compression ratios compression ratio to personal computer end and 640 * 480 is to personal digital assistant, holds to the user to export different digital signals simultaneously.
When long-range user such as personal computer, can only receive the image data 407c of 640 * 480 high compression ratios if be subject to network bandwidth, then the personal computer end can be made image data reprocessing to improve viewing quality.Promptly when decompressing the image data 407c of 640 * 480 high compression ratios, resolution being dwindled (downscaling) is 320 * 240 160 * 120 sizes even, reduces the graininess of image, and then improves the viewing quality of image.
Fig. 5 is second embodiment of the utility model multiplicity digital data streams output device.With reference to figure 5, this multiplicity digital data streams output device comprises data processing unit 501 (including three groups of samplers, block cutter, discrete cosine transform device), selector unit 303, quantization encoding unit 505 (including three groups of quantizers and quantization table), internal storage location 307 and output unit 309.
Image data is 640 * 480 raw video among Fig. 5, and input signal processing unit 501 also produces the image 501a-501c of 640 * 480,320 * 240,160 * 120 3 kinds of resolution respectively.Selector unit 303 receives the data allocations information of output unit 309, and wherein network hard disc and remote personal computer require the image data of 640 * 480 low compression ratios.Mobile phone requires the image data of 160 * 120 high compression ratios.Personal digital assistant requires the image data of compression ratio in 320 * 240.Therefore, selector unit 303 makes up and is dispensed to the 505 do quantifications of quantization encoding unit, encoding process with the image 501a-501c of 640 * 480,320 * 240,160 * 120 3 kinds of different resolutions.
Quantization encoding unit 505 includes three groups of quantization table 505a-505c, three quantizer 505d-505f and three entropy coder 505g-505i.Stored element value is the highest in three quantization tables in the quantization table 505a, so the compression ratio of image data is the highest.Stored element value is minimum in three quantization tables in the quantization table 505c, so the compression ratio of image data is minimum.Element value stored in the quantization table 505b is in the middle of quantization table 505a and 505c, so the compression ratio of image data is between the centre.
In other words, 640 * 480 raw video is through behind data processing unit 501, selector unit 303 and the quantization encoding unit 505, export three quantization encoding data and be temporary in the internal storage location 307, these three quantization encoding data comprise the image data 507b of compression ratio among the image data 507a, 320 * 240 of 640 * 480 low compression ratios and the image data 507c of 160 * 120 high compression ratios.
Reading in the internal storage location 307 image datas of being kept in by output unit 309 at last holds to the user through Network Transmission.Wherein output unit 309 transmits the image data 507c of 160 * 120 high compression ratios to the mobile phone end; The image data 507a of 640 * 480 low compression ratios is to network hard disc and personal computer end; The image data 507b of compression ratio is to the personal digital assistant end in 320 * 240, holds to the user to export different digital signals simultaneously.
More than disclosed only be several specific embodiment of the present utility model, still, the utility model is not limited thereto, any those skilled in the art can think variation all should fall into protection range of the present utility model.
Claims (14)
1, a kind of multiplicity digital data streams output device is characterized in that this device comprises:
Data processing unit receives the input data and exports a plurality of sampling translation data;
Selector unit receives input data allocations and this a plurality of sampling translation data, and distributes these a plurality of sampling translation data of output;
The quantization encoding unit receives this a plurality of sampling translation data, and exports a plurality of quantization encoding data;
Internal storage location, it is temporary to receive these a plurality of quantization encoding data; And
Output unit is exported this data allocations information, and exports after reading these quantization encoding data of this internal storage location.
2, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, has two or more samplers, block cutter and quadrature transcriber in this data processing unit.
3, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, this selector unit is the bypass selector, and this sampling translation data that this selector will receive directly exports this quantization encoding unit to.
4, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, exports this quantization encoding unit to after these two or more sampling translation data combinations that this selector unit will receive distribute.
5, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, has two or more at least quantizers, quantization table and encoder in this quantization encoding unit.
6, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, two or more should sampling translation data, comprise the data of two or more resolution.
7, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, two or more these quantization encoding data comprise the data of two or more resolution and compression ratio.
8, multiplicity digital data streams output device as claimed in claim 1 is characterized in that, this internal storage location has enough internal memories to store this quantization encoding data.
9, a kind of multiplicity digital data streams output device is characterized in that this device comprises:
Data processing unit receives input data and output sampling translation data;
Selector unit receives the input data allocations and the translation data of should taking a sample, and distributes these a plurality of sampling translation data of output;
The quantization encoding unit receives this a plurality of sampling translation data, and exports a plurality of quantization encoding data;
Internal storage location, it is temporary to receive these a plurality of quantization encoding data; And
Output unit is exported this data allocations information, and exports after reading these quantization encoding data of this internal storage location.
10, multiplicity digital data streams output device as claimed in claim 9 is characterized in that, comprises a sampler, a block cutter and a quadrature transcriber in this data processing unit.
11, multiplicity digital data streams output device as claimed in claim 9 is characterized in that, this selector unit is the bypass selector, and this sampling translation data that this selector will receive directly exports this quantization encoding unit to.
12, multiplicity digital data streams output device as claimed in claim 9 is characterized in that, has two or more at least quantizers, quantization table and encoder in this quantization encoding unit.
13, multiplicity digital data streams output device as claimed in claim 9 is characterized in that, these two or more quantization encoding data are the data of two or more resolution and compression ratio.
14, multiplicity digital data streams output device as claimed in claim 9 is characterized in that, this internal storage location has enough internal memories to store this quantization encoding data.
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| CN 200620132360 CN200953634Y (en) | 2006-08-17 | 2006-08-17 | Multiple digital data flow outputting device |
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| CN 200620132360 CN200953634Y (en) | 2006-08-17 | 2006-08-17 | Multiple digital data flow outputting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102246521A (en) * | 2008-12-15 | 2011-11-16 | 微软公司 | Video conference rate matching |
| CN102948148A (en) * | 2010-06-18 | 2013-02-27 | 微软公司 | Combining multiple bit rate and scalable video coding |
| CN103905556A (en) * | 2014-04-10 | 2014-07-02 | 中央电视台 | Digital storage method, device and system for multimedia data in Ethernet |
-
2006
- 2006-08-17 CN CN 200620132360 patent/CN200953634Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102246521A (en) * | 2008-12-15 | 2011-11-16 | 微软公司 | Video conference rate matching |
| CN102948148A (en) * | 2010-06-18 | 2013-02-27 | 微软公司 | Combining multiple bit rate and scalable video coding |
| CN102948148B (en) * | 2010-06-18 | 2017-07-14 | 微软技术许可有限责任公司 | Combine multiple bit rate and scalable video |
| CN103905556A (en) * | 2014-04-10 | 2014-07-02 | 中央电视台 | Digital storage method, device and system for multimedia data in Ethernet |
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Legal Events
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Owner name: WEIGANG TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HONGHAN SCIENCE CO., LTD. Effective date: 20080509 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: China Taiwan Taipei county and Liancheng Road, No. 258, 18 floor, Far East Century Square 1, zip code: Patentee after: ADATA TECHNOLOGY Co.,Ltd. Address before: Taiwan Hsinchu County Tai Yuan Street China jhubei City, No. 26 6 floor 12, zip: Patentee before: Honghan Science & Technology Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20070926 |
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| EXPY | Termination of patent right or utility model |