CN201414195Y - IP camera with two-way video communication function - Google Patents

Abstract

The utility model provides an IP (internet protocol) camera with a two-way video communication function, belongs to the technical field of communications, and aims to realize two-way video synchronouscommunication. The IP camera adopts the technical scheme that a video collection device, a processor with a built-in video encoder and a built-in video decoder, a local display device and an FEC (forward error correction) interface circuit are comprised. The processor adopts i. MX27; the CSI (Chinese system interface) interface of the processor is connected with the video collection device; an LCDC interface is connected with the local display device; and the FEC interface is connected with the Ethernet through the FEC interface circuit and a network transformer in sequence. The IP camera istaken as a server; client (can be a computer device or a 3G mobile phone) is permitted to visit the camera through network; the audio-frequency calling from the client is received by the camera; and only by turning on the TV, voice communication and video communication with the client can be achieved. The IP camera is especially suitable for family nursing and family communication, and can be applied to a small conference system.

Description

Web camera with two-way video communication function

Technical field

The utility model relates to a kind of web camera with video coding and video decode function, belongs to technical field of telecommunications.

Background technology

Web camera is an equipment of gathering and pass through the Ethernet transmission video signal, form by video acquisition head and embedded computer system, the encoding video signal that embedded computer system is gathered the video acquisition head, again resulting video stream signal is sent on the Ethernet, thus the remote transmission of realization vision signal.The web camera that has is with the sampling of Voice ﹠ Video signal Synchronization, and the synchronous coding transmission makes the client of far-end can see image, can hear sound again.

Existing web camera is applied in the local area network (LAN) mostly, can realize the also few of internet video communication, and can only support unidirectional video transmission and single video coding mode mostly, only is applicable to the security protection supervision of communal facility, industrial and mining enterprises etc.

Along with web camera progressively enters family, people wish to use web camera to carry out family's nurse, emotional affection is linked up, this just requires video camera should have two-way video communication function (synchronous video coding and decoding function), and support various video coding mode, can use H.264 coding such as with compunication the time, then can use H.263 coding with the 3G mobile video communication, like this, existing web camera just can't satisfy the growing needs of people.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of web camera with two-way video communication function that can carry out video coding and decoding synchronously is provided.

Problem described in the utility model realizes with following technical proposals:

A kind of web camera with two-way video communication function, the primary processor, video server, local display unit and the FEC interface circuit that comprise video acquisition device, built-in video encoder and Video Decoder in the formation, described primary processor adopts i.MX27, its CSI interface connects video acquisition device, the LCDC interface connects local display unit, and the FEC interface connects Ethernet through FEC interface circuit and network transformer successively.

Above-mentioned web camera with two-way video communication function, the audio process, loud speaker and the microphone that also comprise built-in audio frequency coding and decoding device in the formation, the MICN of described audio process, MICP termination microphone, SPKOUTN, SPKOUTP termination loud speaker, data-interface connects the SSI1 interface of primary processor (i.MX27).

Above-mentioned web camera with two-way video communication function also comprises the 3G module in the formation, described 3G module is connected with the USB interface of primary processor through the USB interface chip.No matter 3G module or FEC interface circuit its objective is audio/video flow is transferred to broadband network or obtains the audio/video flow of client from broadband network that the two can alternative.

Above-mentioned web camera with two-way video communication function, described video acquisition device are cmos digital image sensor or analog video camera, and described analog video camera needs through video processor circuit acquired signal to be handled.

Above-mentioned web camera with two-way video communication function, described local display unit is the LCD that carries of web camera or through TV decoding chip U4 external television set (TV) or VGA monitor, described local display unit presents the audio frequency and video of client, and it and two-way video video camera are installed in same place.

The utility model is built-in looking of hardware (sound) be the coding and decoding device frequently, support is looked (sound) and is frequently encoded and look (sound) synchronous operation of frequently decoding, local look (sound) encoded frequently and can be sent to Ethernet or 3G network by video server, the looking of Ethernet or 3G network (sound) stream frequently also can unpack in this locality and decode, and looks (sound) frequently to television set (or monitor) by looking (sound) delivery outlet output frequently.The utility model is as server end, support client (might be computer equipment or 3G mobile) by this video camera of access to netwoks, video camera is received the audio call of client, only need turn on TV and carry out sound, video communication with regard to energy and client, be particularly suitable for family's nurse, emotional affection communication, also can be used as the mini-session system and use.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is an electric theory diagram of the present utility model;

Fig. 2 is an electrical schematic diagram;

Fig. 3 is a video flowing output flow chart;

Fig. 4 is a video flowing input flow chart.

Each label is among the figure: U1, primary processor, U2, video processor, U3, audio process, U4, TV encoder, U5, USB interface chip, U6, FEC interface circuit, U7,3G module, V, analog video camera, MIC, microphone, SP, loud speaker, T, network transformer, TV, television set.

Embodiment

Referring to Fig. 1, Fig. 2, primary processor U1 (model is i.MX27) chip integration becomes H.264/MPEG4 full duplex hardware compression video processing unit, can be widely used in products such as video monitoring, web camera, digital VTR, network advertising machine, V2IP video telephone, IPTV set-top box, smart mobile phone, portable media player, mobile TV.The MX27 processor is to be that the basis is designed with MX21, based on the ARM926EJ-S kernel.The hardware compression module performance of processor inside is powerful, can reach H.264/MPEG4 encoding and decoding D1 resolution: 720X576,25fps and 720x480,30fps; The full duplex encoding and decoding are carried out reaching VGA resolution: 640x480,30fps simultaneously, rarely have the opponent in present embedded ARM processor.And H.264VGA MX27 can carry out simultaneously, the decoding of the coding of 30fps and MPEG4VGA, 30fps; Also can MPEG4VGA, 30fps coding and H.264VGA, the 30fps decoding carries out simultaneously.

The video acquisition device that provides among Fig. 1, Fig. 2 is analog video camera V, and it connects the CSI interface of primary processor U1 by video processor U2, and the sensor devices of analog video camera V generally adopts the CCD device; Cmos digital image sensor device has appearred again in the video acquisition head now, can be directly connected to the CSI interface of primary processor U1, and web camera has just saved analog-to-digital conversion part (video processor U2) like this, and system is more simplified.

Among Fig. 1, Fig. 2, local display unit is television set TV, and it connects the LCDC interface of primary processor U1 by TV encoder U4.If adopt digital lcd, then display can directly link to each other with the LCDC interface of primary processor U1.

Ethernet can be a local area network (LAN), also can be the Internet.

The interface circuit explanation:

The core A RM926EJS of processor U1: be under the jurisdiction of the general processor at the multitask application of ARM9 family, its interface comprises:

CSI (CMOS Sensor Interface): CSI is a logic interfacing that makes MX27 can be directly connected to outside cmos digital image sensor or CCIR656 standard video source.This interface is as the input of digital video, if the input analog video need add the video processor circuit of supporting the CCIR656 standard.Among Fig. 1, CSI_HSYNC, the CSI_VSYNC of the CSI interface of primary processor U1, CSI_PIXCLK end meets HSYNC, VSYNC and the PCLK end of video processor U2, the YOUT0 of CSI_D0～CSI_D7 termination video processor U2～YOUT7 end respectively.

LCDC (Liquid Crystal Display Controller): LCD controller provides video data for outside output gray level colour code or for the LCD panel.At this place as with the TV decoding chip be connected outputting video signal.Among Fig. 1, HSYNC, the VSYNC of the LCDC interface of primary processor U1, LSCLK end connects H, V and the XCLK end of TV encoder U4 respectively, and SLCDC1_DAT0～SLCDC1_DAT17 connects the data input pin of TV encoder U4.

SSI (Synchronous Serial Interface): SSI is the serial line interface of a full duplex, allows with multiple external device communication.The transfer of data that is used for audio codec at Ben Chu.Among Fig. 1, SSI1_RXDAT, the SSI1_TXDAT of the SSI1 interface of primary processor U1, SSI1_FS and SSI1_CLK end connect ADCDAT, DACDAT, FRME and the BCLK end of audio process U3 respectively.

FEC (Fast Ethernet Controller): the FEC interface is finished the medium access control and the channel interface function of a complete set of IEEE 802.3/Ethernet CSMA/CD agreement.This place is used for this machine and Ethernet intercommunication, exchange video flowing and control information.Among Fig. 1, the FEC_MDIO of the FEC interface of primary processor U1, FEC_MDC, FEC_RX_DV, FEC_RX_CLK, the FEC_RX_ER end meets the MDIO of FEC interface circuit U6 respectively, MDC, RX_DV, RX_CLK, the RX_ER end, FEC_RXD0～FEC_RXD3 end connects RXD0～RXD3 end of FEC interface circuit U6 respectively, FEC_TX_CLK, FEC_TX_EN, FEC_COL, FEC_CRS, the FEC_TX_ER end meets the TX_CLK of FEC interface circuit U6 respectively, TX_EN, COL, CRS, TX_ER end, FEC_TXD0～FEC_TXD3 end connect TXD0～TXD3 end of FEC interface circuit U6 respectively.

AUDMUX (Digital Audio Multiplexer) in the processor U1: it is interconnected that the digital audio multiplex device allows multiple, simultaneous audio sound, data flow to carry out data at point-to-point or the port of putting multiple spot.

VPU (Video Processor Unit) in the processor U1: the video coding and decoding of the per second 30 frame VGA image resolution ratios of full duplex is supported in this unit, supports H.264BP simultaneously, MPEG-4SP and three kinds of video encoding standards H.263P3.

USB (Universal Serial Bus Host Controllers): the USB supervisory controller, support the transceiver form to be connected to ancillary equipment, with low speed or full speed mode operation.Among Fig. 1, the USBOTG_DAR of the USB interface of processor U1, USBOTG_STP, USBOTG_NXT, USBOTG_CLK end meet DAR, STP, NXT, the CLOCK end of USB interface chip U5, the D0 of USBOTG_DAT0～USBOTG_DAT7 termination USB interface chip U5～D7 end respectively.

The external circuit explanation

Video processor U2: the digital video signal that analog video signal is converted to the CCIR656 standard is exported, and it is the input interface circuit of analog video camera, optional device TVP5150A etc.

TV encoder U4: convert the input video of RGB form the output of to VGA normal video, but its signal external tv machine (TV) or VGA display, optional device CH7024 etc.

Audio process U3: the encoding and decoding treatment circuit of audio frequency.Collection, A/D conversion, transmission and reception thereof, the D/A that finishes sound changes, the function of voice playing, optional device WM8974 or WM8951L etc.

USB interface chip U5: the USB (universal serial bus) circuit, support USB V1.1 or USB V2.0 standard, optional device ISP1105W or ISP1504A etc.

The FEC interface circuit: the ethernet physical layer transmission circuit, support 10base-T and 100BASE-TX pattern, optional chip LAN8700 or 100BASE-TX etc.

The workflow of two-way video web camera:

Inside was handled two video flowings simultaneously when the web camera of two-way video was worked, respectively as shown in Figure 3 and Figure 4.

Video flowing shown in Figure 3 output flow chart, its drawn sound, video input-coding-packing-audio/video flow is transferred to Ethernet or 3G network flow process; This video flowing is contained the process that outputs to broadband network from the video acquisition to the video flowing.

Video flowing shown in Figure 4 input flow chart, its drawn audio/video flow input-unpack-decode-reduce audio, video output streams journey; This video flowing is contained leniently, and the tape input video flows to the process of output video to local display unit.

Claims (4)

1, a kind of web camera with two-way video communication function, it is characterized in that, it comprises video acquisition device in constituting, be built-in with the processor (U1) of video encoder and Video Decoder, local display unit and FEC interface circuit (U6), described processor (U1) adopts i.MX27, its CSI interface connects video acquisition device, the LCDC interface connects local display unit, and the FEC interface connects Ethernet through FEC interface circuit (U6) and network transformer (T) successively.

2, according to the described web camera of claim 1 with two-way video communication function, it is characterized in that, the audio process (U3), loud speaker (SP) and the microphone (MIC) that also comprise built-in audio frequency coding and decoding device in the formation, the MICN of described audio process (U3), MICP termination microphone (MIC), SPKOUTN, SPKOUTP termination loud speaker (SP), data-interface connects the SSI1 interface of processor (U1).

3, according to the described web camera with two-way video communication function of claim 1, it is characterized in that, also comprise 3G module (U7) in the formation, described 3G module (U7) is connected through the USB interface of USB interface chip (U5) with processor (U1).

4, according to claim 1,2 or 3 described web cameras with two-way video communication function, it is characterized in that, described local display unit is the LCD that carries of web camera or through TV decoding chip (U4) external television set (TV) or VGA monitor, described local display unit presents the audio frequency and video of client, and it and two-way video video camera are installed in same place.

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