CN1197371C - Speakerphone for video conference system mode - Google Patents
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- CN1197371C CN1197371C CN 00800287 CN00800287A CN1197371C CN 1197371 C CN1197371 C CN 1197371C CN 00800287 CN00800287 CN 00800287 CN 00800287 A CN00800287 A CN 00800287A CN 1197371 C CN1197371 C CN 1197371C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/737—Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/148—Interfacing a video terminal to a particular transmission medium, e.g. ISDN
Abstract
A communication system has a speakerphone and a physically separate sub-system interfacing the speakerphone to a network. The sub-system comprises either a wallmount device for interfacing to a telephone network or a sub-system for video conferencing. The speakerphone and the sub-system communicate through a digital proprietary protocol, e.g., time-division multiplexed. By physically separating the system into a speakerphone and a sub-system that interfaces to the network, the same speakerphone can be used for audio conferencing when used with the appropriate wallmount, and also as audio accessory to a video conferencing system that handles the same protocol.
Description
The present invention relates to a system and method that is used for audio transmission.The invention particularly relates to a loud speaker and video conferencing system.
There are several technology to be used for conference system now, loud speaker and video conference are wherein arranged.Word " loud speaker " refers generally to an audio transmission telephone device that allows hands-free operation.Loud speaker that is used for audio conferencing is equipped with the loud speaker of a high-fidelity and is installed in noise eliminating and echo cancellation system in the shell that sound wave optimizes.Thus, loud speaker is very expensive than hand microphone.Video conferencing system via satellite, cable, ISDN or telephone wire and Voice ﹠ Video compression or full-motion video of transmission in real time.About the more background of video conferencing system and details referring to for example US patent 5,793,415; US patent 5,799,190; US patent 5,515,373; US patent 5,500,880 (Philips's electronics), all at this all as a reference.
The inventor has realized that the loud speaker on market has many shortcomings now.For example, known loud speaker generally is for the particular network interface, for example POTS, ISDN, PSDN, PSTN, LAN, Ethernet, DSL or the like design.Available commercially each loud speaker just is used for audio transmission based on a signaling protocol now, and other protocol interface or data transmission mechanism are not provided.The result is that they can not be upgraded: if a terminal use wishes to be transformed into the ISDN system from for example PSTN system, unique selection seems to be exactly to buy a whole brand-new system.The another one example, the inventor has realized that some have listed a company and is used for the different audio systems and the video conferencing system of loud speaker, although audio-frequency function is very consistent in two technology.
Task of the present invention thus provides a more user-friendly transmission system, and it emphasizes modularization and flexibility, and this is favourable for terminal use and manufacturer.
At last, the invention provides terminal use's transmission system with one first equipment and one second equipment.The baseline unit that this first equipment has has a user interface that carries out audio transmission by transmission network.Second equipment contains an interface subsystem and is used for the baseline unit is connected to network.This subsystem and baseline unit are suitable for using first agreement of Digital Transmission to transmit based on for example time division multiplexing.This subsystem is suitable for using second agreement that is independent of first agreement to transmit by network.This first and second equipment is the device that separates of physics or can be separated from each other when physics adheres to mutually at least, for example be in order to use first equipment by second equipment of other versions, this second equipment has been upgraded or has been suitable for the transmission network of other types.
In the loadspeaker structure of transmission system, the baseline unit has a loudspeaker function, and interface subsystem is connected to a telephone network with loud speaker.In this device, this interface subsystem typically constitutes as a wall equipment.
In a videoconference system architecture, the video conferencing system that has constituted part of baseline unit and subsystem, wherein the baseline unit is provided for the user interface of audio transmission, and wherein interface subsystem not only makes audio frequency handle, and the processing of the video section that transmits.Preferably, the baseline unit is suitable for receiving and transmit data to other the device except that second equipment.Suppose that first agreement is based on for example Time Division Multiplexing, wherein each time slot is represented a channel respectively.Distribute audio frequency, control command with from/allow the different information type (audio frequency, instruction and data) of identification to other the data of equipment to specific time slot, making this system so is multimedia highly versatile and genuine.And the transfer of data of other equipment preferably uses radio communication to be minimized in the quantity of the cable between first and second equipment.This is especially about the desk-top use of the baseline unit among the videoconference system architecture of in the present invention loud speaker and transmission.
The present invention is based on following experience, and user interface function and functionality, network interface are separated, and is about to them and is included in the different equipment, has several advantages.First is as long as interface subsystem is to be complementary with network, and the baseline unit can use in any network now.(microphone, microphone, be used for the device of echo cancellation) in addition all is encapsulated in baseline of the present invention unit because the element of the most of costlinesses in the loud speaker, thisly separately can make the user by simple adjustment or replace interface subsystem and upgrade or revise his/her transmission system.It is cheaply more a lot of than buying a new baseline unit to replace or revise interface unit.The advantage that has for the manufacturer and the retailer of loud speaker or video conferencing system is that all users' needs can be served in the baseline unit of a specification.Differentiation is to occur in the network interface, that is to say that it is the most cheap part in subsystem.With this, of the present inventionly considered environment (green) factor in this respect.Second property is that the baseline unit can be used as self-existent loud speaker or as the audio accessory of a video conferencing system, if this system has the interface that is fit to the baseline unit.Baseline of the present invention unit has a telephone user interface, so that conference call can be carried out from the baseline unit as the mode of carrying out call.The 3rd advantage is to be independent of second agreement between interface and network in first agreement of the numeral between baseline unit and the interface.If the baseline unit has an infrared transceiver and necessary software, this independence can be used to have the data I/O on the baseline unit (for example by the IrDA port).So just might transmit the data that receive by for example notebook computer.In other words, by with the baseline unit by being independent of network on the interface unit, the hardware and software of this baseline unit and first agreement can be optimized to be used for that data obtain, Audio Signal Processing and be used for the control command of video conference.The 4th advantage is only need be consistent with the interface of general communication network and correct codec in the system of different terminals user side.
The present invention is by embodiment and be described in detail in conjunction with the accompanying drawings.
-Fig. 1 is the block diagram with speaker system of baseline of the present invention unit,
-Fig. 2 is the block diagram with video conferencing system of baseline of the present invention unit,
-Fig. 3 is the block diagram of baseline of the present invention unit,
-Fig. 4 is with loud speaker and the functional block diagram that is illustrated in a system of the present invention in the system of video conference,
-Fig. 5 and 6 represents to be used for the form of the TDM agreement of audio conferencing and video conference respectively; With
-Fig. 7 and 8 shows GUI of the present invention aspect.
In whole accompanying drawing, the similar or corresponding feature of identical symbolic representation.
The commercial loud speaker that provides both be not provided to the interface of video conferencing system now, did not transmit the function of data yet.In addition, known loud speaker is designed to the special networks interface, for example is used for ISDN, PSTN, POTS or the like.Thus, if the user wishes to be transformed into a loud speaker based on ISDN from for example loud speaker based on PSTN, he need buy a whole set of new loud speaker, and two whole systems that separate are required to support to relate to the loud speaker and the video conference task of Audio Processing aspect.For example, Polycom sells whole several loud speakers and video conferencing system of separating, and their loud speaker can not be worked with their video conferencing system, and almost can only carry out use separately by the function of separating.The loud speaker of today only is used to the audio transmission based on an agreement, and does not both provide other protocol interface, and transfer of data mechanism is not provided yet.The present invention provides one can modulate and communication system flexibly now.The present invention provides identical device as annex for the interface of video conferencing system, and also be used to as self-existent loud speaker with to a specific communication network, for example the interface that separates of PSTN, ISDN, LAN or the like precision combines.In addition, this loud speaker has an IrDA port and is used for by the infrared transmission data.IrDA (infrared data association) is a tissue, and it is initiated to set up the international standard about the infrared communication link by industrial circle.The ray that infrared light is focused is modulated and send to receiver from transmitter in a short relatively distance.The infrared data transmission becomes important because of the popular of laptop computer, PDA(Personal Digital Assistant), digital camera or the like in wireless data transmission.For example, IrDA link can make transfer files between notebook computer and other data handling system.This IrDA link needs accurate hardware and software.According to the IrDA-1.1 standard, maximum data volume can arrive 2048 bits and minimum transfer rate is 4Mbps.
Fig. 1 is first basic block diagram of a communication system 100 of the present invention.System 100 has a loadspeaker structure.Part in terminal use's side contains first device 101 with baseline unit 102 and second device 103 with subsystem 104.Device 103 for example is the wall dress, and by between device 101 and the telephone network 106.Baseline unit 102 has a user interface 108, is used for carrying out audio transmission by other part (not shown) of network 106 and one or more.First agreement and baseline unit 102 that subsystem 104 is used for Digital Transmission communicate.Subsystem 104 is connected to network 106 with baseline unit 102 by interface, and it uses second agreement to distinguish mutually with first agreement.Second agreement is independent of first agreement.Subsystem 104 is translated into the signal of second agreement and opposite with the signal of first agreement.Protocol conversion itself is known and is described in the various files that for example the US patent 5,649,0,01; US 5,790, and 180; US 5,778, and 189; US 5,182, and 748; US5,805,582.Loud speaker is a desktop apparatus especially, and is taken as infringement in that the rigid line of device between 101 and 103 is interconnected, because it is the obstacle that the restriction desktop apparatus uses.Communication between baseline unit 102 and subsystem 104 is preferably wireless thus.
Fig. 2 is second block diagram of communication system 200 of the present invention.System 200 is constructed for video conference.System 200 contains aforesaid device 101 and (a perhaps cover) device 203, and it handles the input that is received by device 101.In addition, device 203 contains the video data that an equipment (not shown) is used to handle the video data that produces in this terminal and is received from other user's (not shown) by network 204.Having constituted of device 101 and 203 uses the 3rd (network) agreement to be used for the video conferencing system of the real-time Transmission of Voice ﹠ Video.First agreement is independent of procotol, and device 203 is provided for the needed any protocol conversion of network service.The loud speaker that device 101 can be used as separately thus uses, as in Fig. 1, discussing, and as an annex to video conference device 203.Preferably, be wireless at device interconnected between 101 and 203.
Fig. 3 is a block diagram with major part of the baseline unit 102 in device 101.Unit 102 contains a DSP and is used for 302 and is used for signal processing and as a master microprocessor.DSP302 contains for example ADSP-21065L of an analog machine.DSP302 can control several ancillary equipment communicating with the external world.DSP302 has first and second synchronous two-way series port 304 and 306.
The first series connection port 304 has the sync cap of one four line and is connected to audio codec 308,310 and 312.Audio codec 308-312 has for example a stereo ADC/DAC, for example AD1847 of analog machine respectively.Codec 308 is coupled to first and second microphones 314 and 316, and to loud speaker 318.Codec 310 is coupled to third and fourth microphone 320 and 322.Codec 312 is coupled to the 5th microphone 324.Microphone 314,316,320,322 and 324 is two-way in this embodiment.Microphone 314,316 and 320 for example is formed in the device 101, and microphone 322 and 324 is external microphones, and it preferably is connected to baseline unit 102.
DSP302 obtains and provides voice data by synchronous series connection port 304.Series connection port 304 is constituted as the interface of Time Division Multiplexing, and several time slots of 16 voice datas are followed in the pulse of one of them single frames.Each time slot is a different channel and because series connection port 304 is two-way, data send and Data Receiving is carried out simultaneously.Used for example 8 time slots in the agreement of port 304, each time slot is 16 on 4 core buses, makes with this to transmit and receive data line separately.TDM is to using with from DSP302 the time DMA to carry out buffer memory.Per 128 samplings of DSP302 are interrupted (8ms based on 62.5 μ s on the 16KHz sample rate).
Device 101 as discussed above has five audio frequency inputs and has an audio frequency output by loud speaker 318 by microphone 314,316,320,322 and 324.Because the audio frequency input just is sampled, they are cached to the memory of discussing below.After 128 groups five samplings are buffered respectively, produce an interruption.This DMA interrupts allowing DSP302 that dma channel is switched to new buffer and begins to handle the data that newly obtain.
DSP302 carries out sound wave echoes cancellation (AEC) algorithm about voice data, and according to the structure of system, the voice data of buffer memory AEC result and transmission echo cancellation is to subsystem 104 or subsystem 202.Under the situation of the audio conferencing structure of Fig. 2, subsystem 202 will install 101 voice datas that receive, and for example ISDN or the resulting voice data of POTS audio-source (face as follows) mix mutually with source from other.The mixing audio data that subsystem 202 will obtain from other source sends to device 101.When receiving these mixing audio datas, baseline unit these data of 101 buffer memorys and export by loud speaker 318.
This AEC handles and is operated in a large amount of samplings in a time.This only takies several milliseconds of DSP302 from start to end.Therefore, this AEC handles preferably and carries out as a foreground task, and for example keyboard input (discussing below) of other incident, IrDA UART communication (discussing below) and TDM DMA one fix on and handle when interrupting to guarantee the reaction of time.
The function of second series connection port 306 is as to the communication interface of the subsystem 104 of speaker system 100 or to the subsystem 202 of video conferencing system 200.The difference transceiver 326 of port 306 by at a high speed is connected to subsystem 104 or subsystem 202 and uses the TDM communication format of three cores.
In the loadspeaker structure of system 100, baseline unit 102 is coupled to telephone network fully, for example POTS, ISDN, Ethernet or DSL.Because the telephone network of each type 106 has the agreement of oneself, the agreement and the signaling of the following discussion of subsystem 104 translations.Each Ethernet all needs different wall equipment 103.For example wall equipment 103 allows to be connected to the POTS line by the subsystem 104 of precision.102 storages program in baseline unit is used to detect the structure of this system that wherein is used (following discussion) (being POTS at this).102 storages program in baseline unit is used to discern a tinkle of bells detection instruction and instructs from the hang-up of subsystem 104.POTS subsystem 104 provides ADC sampling from the POTS line in addition.
In the video conference structure 200 in system of the present invention, baseline unit 102 sends and receives voice data, system command (for example being used to set up the dialing instruction of video conference) and IrDA packet.Again, 102 storages program in baseline unit is used for the structure of use therein detection (communicating by letter with system 202) system.
The user interface 108 of baseline unit 102 contains a keyboard 328.DSP302 is connected to keyboard 328 according to the matrix of four lines and six row, has the heap(ed) capacity of 24 buttons in this embodiment.DSP302 scans each row to seek of corresponding six buttons of pressing.If a button is pressed, the interruption that DSP302 suspends a safety still is pressed to confirm this button, carries out desired action then.Keyboard 328 for example contain the telephone keypad of a standard (0-9, * #), call out ON/OFF, replay, OK, reference, flicker, and volume+/-.Keyboard 328 allows audio conferencing or video conference to begin in a similar manner.Keyboard 328 also contains the arrow operating key, to allow carrying out user's interaction by the GUI on screen in the video conference structure of system 200.User interface 108 contains a little loud speaker 330 that generally only is used for audio call in addition.
Device 101 can carry out file or data exchange by infrared ray, for example a Word file or an expansion page or leaf are used at the receiving terminal of video conferencing system or from installing the demonstration on screen of 101 to PC from notebook computer PC or PC on knee.In addition, it makes device 101 can control user's PC or other device by the infrared ray instruction.In this end, baseline unit 102 contains respectively the infrared transceiver that is coupled to first and second of DSP302 by first and second IrDA UART infrared controller 336 and 338.Preferably, transceiver 334 and 336 has the data transmission rate on the 4Mbps level.UART represents " universal asynchronous receiver-transmitter ".A UART carries out asynchronous series connection transmission.
DSP302 communicates by the Interface and Controler 330 and 332 of the device of memory-(in different addresses) of arranging, 8 parallel composition typical R S-232UART type.Transceiver 334 and 336 space on device 101 separates in 180 degree.Therefore infrared ray sends with narrow light beam and received direction of light and angle are important.This structure allows all parts can accumulate in conference table on every side so that their IrDA equipment is aimed at desktop apparatus 101 and do not needed to have whirligig 101.Use two IrDA transducers to stop two parts that their data are uploaded to device 101 simultaneously.DSP302 any given time only with controller 336 and 338 in first set up the controller that links and communicate by letter.In the controller 336 and 338 another is under an embargo and is equipped with end up to this link.
Notice that self-existent device 101 can use IRDA link to be used for laptop modem, device 101 works as laptop modem.
Controller 336 and 338 contains the senior UART of PC87109VBE respectively and from the semi-conductive infrared controller of country.This PC87109 is the series connection communicator with infrared communication function.It supports the operation of six patterns: UART, sharp-pointed-IR, IrDA 1.0SIR, IrDA1.1MIR and FIR and user-IR (also long-range or user's Long-distance Control as TV).This UART supports all operational modes.This UART uses a dma channel.Because ultrared communication work is at half-duplex mode, a channel is required for based on ultrared application.For the application of other simplification design of Driver and infrared ray agreement, 12 bit timers with 125ms resolution also contain therein fully.Controller 336 and 338 and UART signaling, IrDA1.0 SIR (2.4Kbps-115.2Kbps) and the IrDA 1.1MIR/FIR (0.576Mbps, 1.152Mbps and 4.0Mbps) of standard be complementary.The FIFO that the FIFO that each controller 336 and 338 has 8 control registers of 8 row and 32 bits respectively is used for transfer of data and 32 bits is used for Data Receiving.One interrupts output and can be programmed with notice DSP302 FIFO sky or almost empty transmission, full or almost full reception-FIFO with by controller 336 or the 338 any mistakes that detect.Each controller 336 and 338 has an interruption output that is connected to the interrupting input end of DSP302.Each IrDA UART controller 336 and 338 also supports DMA request output and DMA notice to export to be used for communicating by letter of high speed, low-heat.Because DSP302 supports parallel DMA device, this IrDA interface can be by using DMA-to drive I/O or implementing by the coding that directly interrupts corresponding to FIFO.
Baseline unit 102 contains an EEPROM340, constitutes the EEPROM of 512KB * 8 this its.DSP302 starts from EEPROM340.EEPROM340 also stores non-volatile data, for example the telephone number of user program, voice reminder and, if speaker system 100 supports to reply mechanical function, information.DSP302 has the SRAM342 of an inside, and the capacity that it has 544Kbit in this embodiment constitutes the data storage of 4K * 48 program storage and 12K * 32.A 512K * 32SDRAM344 needs, because the sound wave echo cancellation is stored a large amount of samplings in each microphone.When systematic function improved, SDRAM334 can be used in procedure stores.DSP302 designed to be used the interface that does not have viscose of SDRAM and is suitable for producing the cycle of refreshing.
Fig. 4 has clarified the block diagram of baseline unit 102 in system 100 and 200 and the interaction between subsystem 104 and 202 respectively.
Device 101 is represented as the DSP 302 of adaptation; Have audio frequency I/O function square frame 402 expression microphones 314,316,320 and 324 and loud speaker 318 discuss in the above; UI 108; Square frame 404 expression is as by IrDA UART controller 336 discussed above and 338 and the IrDA function that provides of transceiver 332 and 334; And square frame 406 is as the interface to wall 103 and system 203.Square frame 406 also contains transceiver 326 and electric drive (not shown) in miscellaneous part in the rigid line embodiment of system of the present invention.Square frame 406 makes device 101 or install 203 with device 103 and communicates.
Device 103 to the wall interface of the telephone network in loadspeaker structure 106, contains a processor 408, and it is as a codec.Notice that baseline unit 102 and wall 103 for example communicate by digital first agreement according to TDM described below, and audio frequency and IrDA data can be encoded by wall 103.
Device 203 or complete device 203 contain an interface/410, one DSP412 of driver square frame and the main storage 414 corresponding to the interface in baseline unit 102/driver square frame 406.Display and Long-distance Control that typical video conference feature for example is used for video conferencing system do not illustrate at this.The UI 108 that notices device 101 provides the complete user of video conferencing system to control.Device 203 major function is to be used for the encoding and decoding of audio frequency, video and other data (for example IrDA produces) and to communicate by letter with remote-control device by network 204.Notice baseline unit 102 and device 203 by digital first agreement for example by communicating according to TDM as described below.
Interface/driver square frame 410 communicates DSP302 and DSP412 each other.DSP412 contains for example ADSP-21065L from analog machine, and DSP302 is as described below.DSP412 be used for from the baseline unit the 102 tdm data demultiplexings that receive and according to preliminary treatment or directly with transfer of data to primary processor 414.Primary processor 414 for example contains one from the GxM of Cyrix and handle the last deployment of network 204.Be used for from the opposite maintenance of the data of network 204 receptions: main frame 414 decompressions and these data of reformatting are so that this DSP412 can carry out time division multiplexing and use the TDM digital protocol that data are sent to baseline unit 102 by interface/driver square frame 410 and 406.
IrDA transceiver 332 and the 334 IrDA data that receive by baseline unit 102 are sent to DSP302.At this, these data can be filtered if desired, and these data are inserted in the position that is fit in the tdm traffic and or send to Video processing subsystem 203 or wall mounted unit 103.
In subsystem 203, this tdm traffic receives by DSP412 and by demultiplexing.From then on because these IrDA data just: data, it can be processed or by DSP412 control and send to main frame 404 carry out last deployment or it can by contiguously by and in main frame 414, handle.Main frame 414 can send these data (compress or do not compress) then and be used to be transferred to the another one end to any one communication linkage (LAN, ISDN or POTS).Opposite is that remote system sends the subsystem of its IrDA data to this locality.
In the structure 100 with wall mounted unit 103, this IrDA interface is used to the modem feature of some kinds.These data are received by processor 408 and are encoded to transmit through ISDN or POTS.The data that processor 408 coding of this locality in wall mounted unit 103 and decoding are used for being transferred on the other end of network 204 or receive from remote system.
Main frame 414 has a windows ce operating system.One cover windows ce library is provided to handle IrDA communication.Notice that device 101 directly is not connected to main frame 414 by interface.The baseline unit sends data to device 203 by synchronous serial line interface.DSP catches data and resolution data between audio frequency, keyboard instruction and IrDA data content.These IrDA data are provided to main frame 414 by isa bus.
Have the hardware extraction layer of chief editor's sign indicating number between windows ce library and IrDA device, this coding is unique for IrDA ancillary equipment.At this, this IrDA ancillary equipment is DSP412.DSP412 reads similar mode with the DSP302 in a kind of and the baseline unit 102 state and data is provided from IrDA UART device 336 and 338.This means that maximum IrDA data transfer rate is restricted in the baseline unit 102 and the bandwidth of installing the IrDA data on the synchronous serial interface between 203 by being used for.
The per 62.5 μ s (16KHz) of serial line interface distribute 8 16 time slot on each direction.This is multiplexed into 2.048Mbps.Because the highest speed IrDA standard needs 4Mbps, maximum data transfer rate does not obtain in this embodiment.The lowest data rate pattern of being supported by IrDA is SIR (infrared mode at a slow speed), and it has allowed between 2.4Kbps and 115.2Kbps are whole.
The IrDA either-way operation, and allowed two-way communication.Baseline unit 102 can send and receive the IrDA data.It is not important sending because the main purpose of IrDA be make video conference subsystem 203 can explicit user file on knee, expansion page or leaf and picture.Transmission needs for shaking hands, and sends a signal between at one's leisure, and when device 101 units are worked, is used for turning back to laptop devices from modulator-demodulator and sends network data.
Because main frame 203 at first sends to check potential ancillary equipment, IrDA UART336 and 338 begins to be configured to be used for transmission.After sending the request of inspection, IrDA UART336 and 338 is set to receiving mode to wait for potential ancillary equipment response.Discuss below with reference to Table I in Fig. 5 and 6 and II between baseline unit 102 and the wall 103 and this TDM agreement between baseline unit 102 and video conference subsystem 203.
Table I among Fig. 5 has provided the overview of the time slot allocation in the TDM agreement of installing between 101, contains baseline unit 102 and wall 103.Device 101 is conduct " CUB " mark in Table I.Wall 103 is connected to single POTS line by interface in this embodiment.This TDM agreement is used 16 of 8 time slots of every time frame, every time slots, and three core buses are used for transmission of audio and instruction between device 101 (Cub) and wall 103.Wall 103 has been represented its identification code (ID) on time slot 6.Cub 101 is designated as slave unit initialization serial port 306, and wherein serial clock and frame synchronization are driven by wall 103.Cub 101 is designated as certain ID that identification combines with the type of network 106, is POTS in this embodiment.
POTS wall 103 contains the device A D1847 of a simulation, stereo ADC/DAC or codec, with reference to top processor 408 and Fig. 4.Codec 408 is with the speed sampling of 8KHz.Because interface is the synchronous serials of three cores, send and the identical signal of data sharing that receives.Cub outputs to AD1847 at time slot 0 with control word, and POTS is in time slot 1 dateout with in time slot 2 auxiliary dateouts.POTS wall 103 is at time slot 3 output states, and POTS is in time slot 4 input data, in time slot 5 auxiliary input data, in one of time slot 6 independent identification code (ID) with at the tinkle of bells detected state of time slot 7.
Table II among Fig. 6 has provided the overview of the time slot allocation in the TDM agreement of installing between 101, the baseline unit 102 that contains, and the video conference subsystem 203 of conduct " Tiger " reference.
Cub101 and Tiger203 have the synchronous serial line interface of direct three cores.Between Cub101 and Tiger203, transmit data with 8.192Mbps.According to 32 time slots of every frame, each time slot contains 16 data, and this has caused the frame rate of 16KHz.Time slot 0-14 contains the data that send to Cub101 from Tiger203.Time slot 16-30 contains the data from Cub101 to Tiger203. Time slot 15 and 31 does not drive by Cub101 or Tiger203, to allow the change of the safety on data direction.Time slot 6 contains the TigerID coding.Table II has been listed the distribution of 32 time slots that are used for the Tiger wall.
When itself and wall 13 or Tiger203 communicated, Cub101 was operated on the TDM pattern.During with default setting of initialization own, it is connected to main frame (wall 103 or Tiger203) up to obtaining an effective I D by interface at CUB101.The ID that receives has determined the mode of operation by the Cub101 setting.Because wall 103 and Tiger203 are the main equipments of main interface, importantly an effective I D was sent to Cub 103 before connection is established.
Fig. 7-8 shows the GUI aspect of video conferencing system 200.Device 101 (Cub) contain user's control of arrow that one group of arrow control button 702,704,706,708 and 710 is used to be presented at the display 804 of video conferencing system 200.Button 702-708 relative set in device and according to the shape moulding of the arrow 802 that separates, the shape of this disk that separates of having recombinated with part 806,808,810 and 812.About button 702-708 is respectively applied for, move left and right pointer 802, in a menu with option, this option for example is arranged in the grid as bullet 814 and 816.One of action button 702-708 makes pointer be divided into a plurality of part 806-812, its corresponding to selected one the directional smoothing of button 702-708 move to nearest option.When arriving, this each several part is combined and forms a disk around bullet.Bullet 712 makes one to select effectively.Visual correlation between the part 806-812 of hard manual 702-708 and disk is the user friendly that has improved system 200 clearly the time when operating in conceptive.Level and smooth image simplification the navigation and because the user do not wish to lose the track of pointer on screen.Certainly, in the GUI that is illustrated in the video conference content except, be useful in this respect.
In fact concise and to the point, Cub101 distinguishes mutually with the loud speaker that has existed in a different manner.The first, its adjustability makes it can be used as a plurality of roles, promptly is connected to video conferencing system (Tiger) 203 as an annex by interface, perhaps is connected to wall 103 as a loud speaker by interface.When using as the annex to Tiger203, Cub101 provides the audio frequency of better quality by being positioned at the nearer microphone of audio-source 314,316,320 (with optional external microphone 322 and 324).The extremely important feature of another one is that Cub101 allows to make conference call just similar in appearance to a general loud speaker.The second, the Cub ability that IrDA link transmission data are provided during conference call is unique.For example, people can be in the middle of the conference call and decision sends to far-end from their notebook computer with the copy of a text.The thing that all they have to do is to upload it to obtain it at the other end by the IrDA port (404) of Cub.The 3rd upgrading that is not both by Cub101, this Cub has to the standard interface of Tiger203 or wall 103.This user can be upgraded to a video conferencing system always, perhaps changes by a simple wall to be transformed into another from a communication network.The method that so obtains is to realize 102 by designing general baseline unit 102, and this unit is connected to Tiger203 or wall 103 by the data interlinkage agreement by interface, is illustrated among Table I and the II.In addition, Cub101 contains to be useful on and carries out audio echo cancellation (AEC) necessary all electronic equipments, and keyboard is used to be provided with a pointer and an IrDA port of calling out and being controlled on the screen on being connected to Tiger203 the time and is used for transfer of data.Wall mounted unit 103 and Tiger203 contain needed power supply and network interface.
The benefit that so obtains is diversified.As the loud speaker of an interaction, Cub101 provides outstanding multi-microphone audio quality, and has simplified the transfer of data on the IrDA communication port.In addition, allow the PSTN loud speaker to be changed to an ISDN loud speaker by simplifying change wall mounted unit 103.As an annex to Tiger203, Cub101 has allowed the mode that conference call is identical with general call to be provided with: number is input in the keyboard.For example, the method that is used to be provided with conference call now is to use the information on screen.Yet also produce: a conference call preferably starts as call.It is possible that Cub101 is connected on the Tiger203.Cub101 provides the upgradeable path from the loud speaker of unit to the Tiger video conferencing system, and keeps very identical speaker performance.Therefore, an independent budget and/or actual restriction (little table) have an attracting variation path about the nearest attracting conferencing technology of Philips's electronics (Tiger), and do not need to buy the two covers equipment that is respectively applied for the audio and videoconference system separately.Last advantage can be left in the basket, but it is exceedingly useful in the back.The general baseline unit 102 of Cub contains the most expensive element, and therefore, if manufacturing project is stopped or has to be modulated to the interface of other type, it can not have influence on manufacturer.For example, if the ISDN loud speaker is more than the design of being sold, the invention of a costliness just can not produce, because identical baseline unit can use in other speaker system.
Claims (12)
1. terminal use's transmission system, contain:
-having first device of a baseline unit, this baseline unit contains a user interface can carry out audio transmission by transmission network; With
-one second device, it has a subsystem by interface the baseline unit is connected to network:
Wherein,
-this subsystem and baseline unit use first agreement that is used for Digital Transmission to be suitable for transmission,
-this subsystem uses one second agreement that is independent of this first agreement to be suitable for starting transmission by network.
2. system as claimed in claim 1, wherein:
-baseline unit has a loudspeaker function;
-transmission network contains a telephone network;
-subsystem can make the baseline unit be connected to telephone network by interface.
3. system as claimed in claim 1, wherein:
-the first and second devices have constituted the part of video conferencing system; With
-the second device is configured to handles the video data that is used for video conference.
4. system as claimed in claim 3, wherein:
The user interface of-baseline unit contains a keyboard, can carry out user's control of video conferencing system.
5. system as claimed in claim 4, wherein:
The keyboard of the user interface of-baseline unit contains an operating key, so that the pointer on screen is controlled.
6. system as claimed in claim 1, wherein first agreement contains time-multiplexed data and command protocols.
7. system as claimed in claim 1, wherein the baseline unit is suitable for receiving the wireless data that is sent by network.
8. the method for carrying out videoconference by a network, this method contains:
-received audio signal in first device,
-in first device, audio signal is converted to numerical data,
-use one first host-host protocol that numerical data is sent to second device,
-use be independent of first host-host protocol second host-host protocol in second device coding digital data to be connected to network by interface.
9. method as claimed in claim 8, contain in addition:
-receiving radio data in first device;
-use the TDM agreement to send numerical data and wireless data to the second device.
10. the method for carrying out video conference by a network, this method contains:
-received audio signal in first device;
-in first device, audio signal is converted to numerical data;
-use one first host-host protocol that numerical data is sent to second device; With
-use be independent of first host-host protocol second host-host protocol in second device coding digital data to be connected to network by interface.
11. the method as claim 10 contains in addition:
-control from the user that first device carries out video conference by a keyboard that is installed on first device.
12., closed in addition as the method for claim 10:
-receiving radio data in first device;
-use the TDM agreement to send numerical data and wireless data to the second device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US26405899A | 1999-03-08 | 1999-03-08 | |
| US09/264058 | 1999-03-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1296696A CN1296696A (en) | 2001-05-23 |
| CN1197371C true CN1197371C (en) | 2005-04-13 |
Family
ID=23004386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00800287 Expired - Fee Related CN1197371C (en) | 1999-03-08 | 2000-02-18 | Speakerphone for video conference system mode |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1078523A1 (en) |
| JP (1) | JP2002539684A (en) |
| CN (1) | CN1197371C (en) |
| AU (1) | AU773804B2 (en) |
| BR (1) | BR0005250A (en) |
| WO (1) | WO2000054502A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8964604B2 (en) | 2000-12-26 | 2015-02-24 | Polycom, Inc. | Conference endpoint instructing conference bridge to dial phone number |
| US9001702B2 (en) | 2000-12-26 | 2015-04-07 | Polycom, Inc. | Speakerphone using a secure audio connection to initiate a second secure connection |
| US8934382B2 (en) | 2001-05-10 | 2015-01-13 | Polycom, Inc. | Conference endpoint controlling functions of a remote device |
| US8976712B2 (en) | 2001-05-10 | 2015-03-10 | Polycom, Inc. | Speakerphone and conference bridge which request and perform polling operations |
| US8934381B2 (en) | 2001-12-31 | 2015-01-13 | Polycom, Inc. | Conference endpoint instructing a remote device to establish a new connection |
| US8947487B2 (en) | 2001-12-31 | 2015-02-03 | Polycom, Inc. | Method and apparatus for combining speakerphone and video conference unit operations |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4029528A1 (en) * | 1990-09-18 | 1992-03-19 | Philips Patentverwaltung | TELEPHONE FOR A SERVICE-INTEGRATED DIGITAL NEWS NETWORK (ISDN) |
| FI97518C (en) * | 1993-08-12 | 1996-12-27 | Nokia Telecommunications Oy | Method and apparatus for matching CT2 calls to an ISDN subscriber line |
| FR2711873B1 (en) * | 1993-10-26 | 1995-11-24 | Thomson Csf | ISDN / PSTN dual-mode videophone terminal. |
| US5524110A (en) * | 1993-11-24 | 1996-06-04 | Intel Corporation | Conferencing over multiple transports |
| US5528666A (en) * | 1994-07-01 | 1996-06-18 | Motorola, Inc. | Personal phone expansion system |
| DK0849965T3 (en) * | 1996-12-20 | 2000-11-20 | Plus Mobilfunk Gmbh E | Cordless telephone |
-
2000
- 2000-02-18 CN CN 00800287 patent/CN1197371C/en not_active Expired - Fee Related
- 2000-02-18 JP JP2000604608A patent/JP2002539684A/en active Pending
- 2000-02-18 AU AU34238/00A patent/AU773804B2/en not_active Ceased
- 2000-02-18 EP EP00912482A patent/EP1078523A1/en not_active Withdrawn
- 2000-02-18 BR BR0005250-7A patent/BR0005250A/en not_active IP Right Cessation
- 2000-02-18 WO PCT/EP2000/001344 patent/WO2000054502A1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002539684A (en) | 2002-11-19 |
| AU773804B2 (en) | 2004-06-10 |
| BR0005250A (en) | 2001-01-30 |
| EP1078523A1 (en) | 2001-02-28 |
| CN1296696A (en) | 2001-05-23 |
| WO2000054502A1 (en) | 2000-09-14 |
| AU3423800A (en) | 2000-09-28 |
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Granted publication date: 20050413 Termination date: 20100218 |