CN202514004U

CN202514004U - Audio and video encoding and decoding core board of digital disc video recorder

Info

Publication number: CN202514004U
Application number: CN201220125080XU
Authority: CN
Inventors: 罗彦; 陈昌宝; 赵启挺
Original assignee: HANGZHOU JUFENG TECHNOLOGY Co Ltd
Current assignee: HANGZHOU JUFENG TECHNOLOGY Co Ltd
Priority date: 2012-03-29
Filing date: 2012-03-29
Publication date: 2012-10-31
Anticipated expiration: 2022-03-29

Abstract

An audio and video encoding and decoding core board of a digital disc video recorder is characterized by being integrated with a central processing unit, a collecting chip for collecting audio and video signals, a storer, a memory, a network PHY (physical layer) chip for transmitting data to a network, a clock, and an interface module which is arranged on the edge of the core board and is connected with an external interface, wherein the audio and video collecting chip, the storer, the memory, the network PHY chip and the clock are connected with the central processing unit respectively; the central processing unit, the audio and video collecting chip, the network PHY chip and the clock are connected with the interface module respectively. The audio and video encoding and decoding core board of the digital disc video recorder has the characteristics of simple structure, low cost, small size, high integration, wide application range and the like.

Description

Digital hard disc video recorder audio/video encoding/decoding core board

Technical field

The utility model relates to a kind of digital hard disc video recorder audio/video encoding/decoding core board, mainly is applicable to the security protection field of video monitoring.

Background technology

Along with developing rapidly of security protection video monitoring in recent years, the adding of how tame both at home and abroad large-scale semiconductor design company, scheme is maturation more and more, and performance is powerful all the more.4/8 road DVR solution of present single-chip on the market mainly contains following several characteristics:

1, the integrated level of main control chip further improves, main peripheral interface such as SATA, and VGA, TV, USB is integrated in the master chip.The video capture processor of eight-in-one becomes main flow, and the video capture processor of encapsulation and compatible fully four unifications of pin.

2, coding/decoding capability significantly promotes, and 4/8 D1 DVR scheme of single-chip continues to bring out, like TI816X, and sea think of 3515/3520 etc.

3, the lifting of manufacturing process makes main control chip volume and power consumption further reduce.

But receive the influence of traditional thinking, the following shortcoming of ubiquity of the product that most at present digital hard disc video recorder producers is designed:

1, from application, can't expand to the multiple industry relevant fast with audio frequency and video because the product that it designed often specific aim is very strong, can't satisfy the application demand of multiple industry simultaneously to functional specification from the outward appearance of product.

2, from the construction cycle, the change of each product structure or functional specification all need design mainboard again, has prolonged the Products Development cycle greatly undoubtedly.

3, from manufacturing process, adopt the mainboard of four laminates or even six laminates design, complex process, the production cycle is long, has prolonged the delivery cycle of product.

Summary of the invention

The technical problem that the utility model will solve is: to the problem of above-mentioned existence provide a kind of simple in structure, cost is low, volume is little, integrated level is high, the digital hard disc video recorder audio/video encoding/decoding core board of applied range.

The technical scheme that the utility model adopted is: digital hard disc video recorder audio/video encoding/decoding core board; It is characterized in that: be integrated with central processing unit on the said core board, be used to gather audio-video signal audio-video collection chip, memory, internal memory, be used for transfer of data to network of network PHY chip, clock, and be arranged in the core board edge and be used for the interface module that is connected with external interface; Wherein audio-video collection chip, memory, internal memory, network PHY chip and clock link to each other with central processing unit respectively, and central processing unit, audio-video collection chip, network PHY chip and clock are connected with interface module respectively.

The model of said audio-video collection chip is NVP1108 or NVP1104B.

The size of said memory is 64Mb or 128Mb.

The size of said internal memory is 512Mb or 1Gb.

Said interface module includes input/output interface, SD card, HDMI interface, TTL serial ports, Ethernet interface, the video input interface that is used for external USB interface, SATA interface, VGA interface, TV interface, I/O warning, the pin that the audio frequency input/output interface connects.

The beneficial effect of the utility model is: the utility model is integrated in central processing unit, audio-video collection chip, memory, internal memory, network PHY chip, clock and input/output interface on the same circuit board; Further improved integrated level; Because input/output interface is complete; The client only needs to cooperate the utility model core board can design the exclusive product of oneself, and do not need to design again core board according to the peripheral feature board of the cabinet mechanism design of oneself; Thereby reduced the secondary development difficulty, shortened the Products Development cycle.A large amount of modular softwares are set up, and can directly use, and have made things convenient for the maintenance and the function upgrading of product.Integrated, the small and exquisite volume of core board height has been expanded the field of its application greatly, like Vehicular video monitoring, and intelligent building, visual door control systems etc. can be integrated into core board module and its original system perfection in the unified hardware system.In addition, core board adopts four layers of pcb board, and feature board adopts 2 layers of PCB, has reduced production cost and has made threshold, has improved product competitiveness.

Description of drawings

Fig. 1 is the system block diagram of the utility model.

Fig. 2 is the fundamental diagram of the utility model.

Fig. 3 is the structure chart of the utility model core board.

Embodiment

As shown in Figure 1; The present embodiment core board comprises central processing unit 1 (HI3515), audio-video collection chip 2 (NVP1108 or the NVP1104B of optional NEXTCHIP company; In 4 road videos when input, used NVP1104B, uses NVP1108 during the input of 8 road videos), memory 3 (optional 64Mbits or 128Mbits Nor Flash), internal memory 4 (optional DDR2-800 512MBits or 1GBits), network PHY chip 5 (SMSC8710), clock 6 (DS1307) and the interface module 7 that is used for being connected with outside various interface (comprising USB interface, VGA interface, SATA interface, Ethernet interface etc.); Wherein audio-video collection chip 2, memory 3, internal memory 4, network PHY chip 5 and clock 6 link to each other with central processing unit 1 respectively; Central processing unit 1, audio-video collection chip 2, network PHY chip 5 and clock 6 are connected with interface module 7 respectively, for ease of be connected the edge that this example is arranged in interface module 7 whole core board with outside various interface.Provide externally that present embodiment can work alone under the prerequisite of power supply, the client can be based on the customization design of present embodiment realization flexibly and fast oneself.

As shown in Figure 3; Said interface module 7 includes input/output interface, SD card, HDMI interface (HDMI), TTL serial ports, Ethernet interface, the video input interface that is used for external USB interface, SATA interface (serial ATA interface), VGA interface, TV interface, I/O warning, the pin that the audio frequency input/output interface connects.As shown in Figure 3, interface module 7 comprises J1, J2, J3, J4, five modules of J5 altogether in this example.

Wherein, J1 has comprised 18 pins, and C1 wherein, C2 are the 1.0V input, as the core voltage of central processing unit 1; C5, C6 are the 3.3V input, give central processing unit 1, network phy chip 5, memory 3 power supplies respectively, also import as the interface voltage of audio-video collection chip 2; C8, C9 is for connecting the pin of USB1 interface; C10, C11 is for connecting the pin of USB0 interface; C13, C14, C15, C16 is for connecting the pin of RJ45 signaling interface; C17 is the network speed indicator light; C18 is that network connects indicator light; C3, C4, C7, C12 are power supply ground.

J2 has comprised 36 pins, and wherein A1 ~ A8 is that video input 1 ~ video is imported 8 pins (if being that device A 5 ~ A8 of 4 tunnel can not connect), is used for being connected with the external video input interface; A10 ~ A17 is that audio frequency input 1 ~ audio frequency is imported 8 pins (concrete audio frequency number can connect according to the Different products definition), is used for being connected with the external audio input interface; A19 is the audio frequency output pin, is used for being connected with the external audio output interface; A20 ~ A25 is that external alert input 1 ~ external alert is imported 6 pins, is used for being connected with the external alert input interface; A26 ~ A27 is a multiplexing pins; Be external alert input 7 and external alert input 8 when using, represent network lamp (this lamp is bright when the users from networks logging device) and video recording lamp (this lamp is bright when equipment is in video state) during as status indicator lamp as the input of reporting to the police; A29 is a video CVBS output pin; A31 ~ A33, A35, A36 are used for being connected with outside VGA interface as the VGA output pin; A9, A18, A28, A30, A34 ground connection.

J3 has comprised 36 pins, B1 wherein, and B8, B11 ~ B17 is the multiplexing pins of SD card and HDMI interface, is used for being connected with the HDMI interface with outside SD card; B2 is the alarm output signal pin, is used for being connected with the external alert output interface; B3 is that buzzer connects pin; B4, B35 are that feature board is selected signal, and the difference in functionality plate has the different functions specification, are the feature boards of which kind of specification through what read that this feature board selects signal condition to judge to be connect during initialization in the software; B6, B7 are respectively the status indicator lamp of SATA and HDMI; B9, B10 are the serial ports pin of the keypad of equipment, B19, and B20, B21 are the RS485 interface pin; B22, B23 are the debug serial port pin, and B24, B25 are that iic bus connects pin, are the signaling interfaces of control clock 6; B26, B27, B30, B31 are the SATA2 interface pin, B28; B29, B32, B33 is the SATA1 interface pin, is used for being connected with outside SATA interface; B5, B18, B34 are power supply ground, the infrared reception information of B36 pin.

J4 and J5 have comprised 6 pins altogether, and wherein D3 is external 1.8V input, and as the core voltage of audio-video collection chip 2, D4 is external 1.2V input, is compatible other audio-video collection chip core voltage, D1, and D2, D5, D6 are power supply ground.

In the practical application; Can design the function corresponding plate as required cooperates with this routine core board; The pin that is used to connect the external USB interface, 1.0V and the 3.3V input of J1 end are connected with the peripheral function plate is corresponding, are used to connect the pin of ETHERNET signaling interface and are connected with Ethernet interface on the feature board; 8 road audio frequency input of J2 end, the input of 8 road videos, audio frequency output, video output, VGA output respectively with feature board on corresponding interface be connected; J3 end be respectively applied for connect SD card, HDMI interface, keypad serial ports pin respectively with feature board on corresponding interface be connected; Two external power supply input pins of J4, J5 end are connected with the power supply input on the feature board.The combination of core board and feature board can select the front machine to paste also can the manual subsides in the back side.

Therefore, the interface that utilizes the said coding and decoding video core board of present embodiment to cooperate the peripheral function plate to expand can comprise at most: the input of 8 road videos, the output of 1 road video, the input of 8 road audio frequency; The output of 1 road audio frequency, VGA, the 8 tunnel report to the police imports; 1 the tunnel reports to the police exports SD card, HDMI; (serial ports 0 comprises pin B22 and B23 to the serial ports of 3 road TTL, is fixed as debug serial port and RS 232 outputs, needs the outside RS232 of increasing interface chip in the time of as the RS232 interface; Serial ports 1 comprises pin B19, B20 and B21, is fixed as the RS485 interface, needs the outside RS485 of increasing interface chip; Serial ports 2 comprises pin B9 and B10, is fixed as the interface of communicating by letter with keypad), 2 road SATA, 2 road USB, 100M Ethernet.

As shown in Figure 2; The operation principle of present embodiment is following: said audio-video collection chip 2 is used to gather audio-video signal; Central processing unit 1 carries out preliminary treatment with the signal that collects on the one hand, through audio and video output interface preview output, on the other hand the audio-video signal that collects is encoded then; Data behind the coding can be delivered to external hard drive through the SATA interface and store, and network PHY chip 5 also capable of using carries out Network Transmission through Ethernet interface; When needing playback, central processing unit 1 reads the data in the hard disk through the SATA interface, and these data are decoded, at last through audio and video output interface output.Memory 3 is used for storage system relevant program and configuration file; Internal memory 4 is memory devices of system; Network PHY chip 5 is used for transfer of data to network, the clock signal of clock 6 output systems, interface module 7 be used for the peripheral function plate on interface be connected and carry out communication.

Claims

1. digital hard disc video recorder audio/video encoding/decoding core board; It is characterized in that: be integrated with central processing unit (1) on the said core board, be used to gather audio-video signal audio-video collection chip (2), memory (3), internal memory (4), be used for transfer of data to network of network PHY chip (5), clock (6), and be arranged in the core board edge and be used for the interface module (7) that is connected with external interface; Wherein audio-video collection chip (2), memory (3), internal memory (4), network PHY chip (5) and clock (6) link to each other with central processing unit (1) respectively, and central processing unit (1), audio-video collection chip (2), network PHY chip (5) and clock (6) are connected with interface module (7) respectively.

2. digital hard disc video recorder audio/video encoding/decoding core board according to claim 1 is characterized in that: the model of said audio-video collection chip (2) is NVP1108 or NVP1104B.

3. digital hard disc video recorder audio/video encoding/decoding core board according to claim 1 and 2 is characterized in that: the size of said memory (3) is 64Mb or 128Mb.

4. digital hard disc video recorder audio/video encoding/decoding core board according to claim 1 and 2 is characterized in that: the size of said internal memory (4) is 512Mb or 1Gb.

5. digital hard disc video recorder audio/video encoding/decoding core board according to claim 1 and 2; It is characterized in that: said interface module (7) includes input/output interface, SD card, HDMI interface, TTL serial ports, Ethernet interface, the video input interface that is used for external USB interface, SATA interface, VGA interface, TV interface, I/O warning, the pin that the audio frequency input/output interface connects.