GA/T 882-2010Technical requirements for trial synchronous recordin system (English PDF)

4.1 Appearance requirements

The appearance of the system should be neat and tidy, and the surface should be free from obvious defects in the production process.

4.2 Structural Requirements

The operation of switches, buttons and knobs should be flexible and reliable, the parts should be tightened without loosening, the connectors should be able to be connected reliably, the indications should be correct, and the layout should be properly arranged.

management, easy to operate.

4.3 Functional and performance requirements

4.3.1 Acquisition equipment

4.3.1.1 It has the function of real-time acquisition of interrogation sound and image. Real-time and clear capture of the voices and background of the interrogator and the person being interrogated Sound, real-time and clear collection of frontal mid-range and place panoramic images of the person being interrogated, including ambient temperature, humidity and time.

4.3.1.2 A digital camera with a resolution of 720P or 1080P should be used, and the minimum illumination is 0.5lx.

4.3.1.3 Cardioid directional pickups are used, the sensitivity is -40dB±3dB, and the frequency response is 50Hz~15kHz. The signal-to-noise ratio is greater than 65dB, the dynamic range is greater than 96dB.

4.3.1.4 The audio sampling frequency of the system is 16kHz and 16bit quantization.

4.3.2 Transmission equipment

4.3.2.1 Between the acquisition equipment and the control equipment, the network cable, video cable, audio cable and signal control cable should be used to connect the equipment.

To ensure the accuracy of sound, image quality and control signal.

4.3.2.2 Using MPEG-4, H.264, AAC and other audio and video real-time compression network video server technologies, the resolution of a single screen is greater than or equal to at 704 pixels × 576 pixels, and the transmission code stream is greater than or equal to 512kbit/s, it should be able to realize the webcasting, audio-text interaction, and communication of the interrogation process.

Ask about the selection of live scenes.

4.3.3 Display playback device

4.3.3.1 Real-time and clear display of the frontal mid-shot and the site panorama image of the person being interrogated, including ambient temperature, humidity and time.

4.3.3.2 The audio and video of the interrogation can be played back clearly. The sound quality should not be distorted, and the sound playback should be synchronized with the video.

4.3.3.3 The resolution and interface of the display and playback equipment shall match those of the acquisition and control equipment.

4.3.3.4 It has the function of switching between single-screen and dual-screen display.

4.3.4 Storage Devices

4.3.4.1 It has the functions of real-time recording of interrogation audio and video with dual optical drives and real-time automatic storage of hard disk. There should be more than two video inputs, two independent Independent audio input, the encoding standard is MPEG-4, H.264, AAC. The resulting audio and video files can be played in a universal player.

4.3.4.2 With clock correction function.

4.3.4.3 It has the function of setting the title content of the case number, name, name of the interrogator, name of the person being interrogated, and the location of the interrogation. Inside the title After the content is set, the title is automatically generated and superimposed on the video screen.

4.3.4.4 It has the function of calculating the hash value of the recorded and stored audio and video data, and combines it with the audio and video data in the form of a separate file.

stored together.

4.3.4.5 Real-time detection and display of the remaining usage time of the storage medium capacity. When it is less than 30min, a prompt should be given. should have audio and video Data loss, abnormal alarm and disposal method prompt function.

4.3.4.6 In the process of CD burning and real-time automatic storage on hard disk, it should have the key mark function.

4.3.4.7 The frame rate of the video stored on the hard disk is greater than or equal to 25fps, and the image resolution is greater than or equal to 704 pixels × 576 pixels.

4.3.4.8 For audio and video data stored in CD-ROM and other media, the encoding standard shall be MPEG-4, H.264, AAC, and the image resolution shall be greater than or equal to 704 pixels x 576 pixels.

4.3.4.9 The CD recording should be completed within 5 minutes after the interrogation. When the disc recording fails, a prompt and clear prompt "Burning" should be displayed on the display.

Failed", prompting to replace the faulty disc. After the disc is replaced, the audio and video data stored in the hard disk can be automatically supplemented and recorded.

4.3.4.10 On the premise of ensuring the quality of audio and video recordings, a CD should be able to record 4 hours of audio and video data.

4.3.4.11 It has the function of automatic disc sealing.

4.3.5 Control equipment

4.3.5.1 It has the function of adjusting and controlling the focal length of the main camera lens and the gain of the pickup.

4.3.5.2 The lens control shall have the functions of zoom, auto focus and aperture setting.

4.4 Other requirements

4.4.1 System working environment. the temperature is -5°C~45°C, and the humidity is 15%~80%.

4.4.2 System working noise. <=35dB.

4.4.3 Button response time. < 1s.

4.4.4 Power. AC (220±22)V, (50±2)Hz, < .200W.

4.5 Safety Requirements

Should comply with the relevant provisions of GB 16796-2009.

4.6 Radio disturbance limit requirements

The radio disturbance limit of the product shall meet the requirements of the conducted disturbance limit of Class A ITE power terminals in GB 9254-2008, see Table 1.

4.7 Reliability Requirements

The reliability level of the product is measured by the mean time between failures (MTBF), and the unacceptable value of MTBF should be greater than or equal to 5000h.

5.1 Basic principles

The test methods specified in this standard apply to storage devices. The test should be carried out under the following conditions, climatic environment and reliability test except.

a) Ambient temperature. -5°C~ 45°C;

b) Relative humidity. 15%~80%;

c) Atmospheric pressure. 86kPa~106kPa.

5.2 Visual inspection

Visual inspection is carried out by visual inspection to determine whether the results meet the requirements of 4.1.

5.3 Structural inspection

Check by visual inspection and hand test to determine whether the results meet the requirements of 4.2.

5.4 Functional check

5.4.1 Check item by item according to the stipulations in 4.3 to determine whether it complies with the stipulations.

5.4.2 The detection of hash value anti-counterfeiting authentication information shall be verified by a general test algorithm provided by a third party.

5.5 Performance Check

5.5.1 Adaptability of working power supply

Adjust the working power supply, it should be able to work normally within ±10% of the nominal value.

5.5.2 Power consumption

Use a power wattmeter, connect it to both ends of the load, and judge whether the result meets the requirements of 4.4.4.

5.6 Safety test method

Test according to GB 16796-2009.

5.7 Radio disturbance limit test

Carry out the test according to the provisions of GB 9254-2008.During the test, the functions of recording, video playback and network should work normally.

5.8 Environmental test

5.8.1 Principles

The initial inspection and final inspection specified in each environmental test are carried out in accordance with the provisions of 4.1, 4.2 and 4.3 for appearance, structure and function.

Inspection and key function inspection, the above inspections should be normal.

5.8.2 Low temperature test

Carry out the test according to the provisions of GB/T 2423.102-2008.The test temperature is 0 °C, the test time is 2h, the power is turned on, and the recovery time is for 2h.

5.8.3 Storage and transportation low temperature test

Carry out the test according to the provisions of GB/T 2423.102-2008.The test temperature is -20°C, no electricity is applied, and the test time is 16h.

After the completion of the recovery under normal climatic conditions for 2 hours, the final test was carried out.

In order to prevent the test sample from frosting and condensation during the test, the test sample is allowed to be sealed with polyethylene film and the test can be carried out if necessary.

Put moisture absorbent in the sealing sleeve.

5.8.4 High temperature test

5.8.4.1 Working high temperature test

Carry out the test according to the provisions of GB/T 2423.102-2008, the test temperature is 40 °C, and the power is turned on for 2 hours to check whether the prototype works.

Normal, the recovery time is 2h, and the final test is carried out.

5.8.4.2 High temperature test for storage and transportation

Carry out the test according to the provisions of GB/T 2423.102-2008, the test temperature is 60 °C, no electricity is applied, the test time is 2h, and the test is completed.

After that, the recovery time was 2h, and the final detection was carried out.

5.8.5 Constant damp heat test

5.8.5.1 Constant damp heat test under operating conditions

Carry out the test according to the provisions of GB/T 2423.102-2008, the test temperature is 40 °C, the relative humidity is 40%~90%, Start the test, after 2h of test, power on and run during this period to test whether the work is normal, the recovery time is 2h, and the final test is carried out.

5.8.5.2 Damp heat test under storage and transportation conditions

Carry out the test according to the provisions of GB/T 2423.102-2008, the test temperature is 40 °C, the relative humidity is 90%~95%, before the test for the initial detection, the sample is not energized. After the test time of 48h, the recovery time after the test is 2h, and the final test is carried out.

5.8.6 Vibration test

The test is carried out according to the provisions of GB/T 2423.58-2008, and the test sample is fixed on the vibration table according to the working position, and is not energized.

Three mutually perpendicular axis directions vibrate. After the vibration test is completed, the detection is carried out.

5.8.7 Impact test

Carry out the test according to the provisions of GB/T 2423.57-2008, do not energize, and make shocks in three mutually perpendicular axial directions respectively, and then the number is 3 times each. After the test, check.

5.8.8 Drop test of transport package

Carry out the drop test according to the provisions of GB/T 4857.5-1992, select four sides, and drop each side once. Check after the test.

5.9 Reliability test

5.9.1 Test conditions

The purpose of reliability testing is to determine the reliability level of a product under normal use conditions. During the test period, the comprehensive factors are specified as follows.

a) Ambient temperature. -5°C~ 45°C;

b) Relative humidity. 15%~80%;

c) Working voltage. AC (220±22)V, (50±2)Hz.

5.9.2 Test plan

According to the provisions of GB/T 5080.7-1986.

5.9.3 Test time

It should continue until the total number of failures in the test set can be accepted or rejected according to the test plan, and the test time of multiple test samples should be greater than or equal to half of the average test time for all samples tested.

5.9.4 Test samples

The reliability test prototype shall be randomly sampled from the products that have passed the factory inspection, and the number shall be greater than or equal to 2 units.

5.9.5 Check test items

During the test, the appearance, structure and function should be checked and tested 3 times.

5.9.6 Failure data

5.9.6.1 Correlation failure criteria

Failures caused by the product itself are counted as associated failures.

a) If any one of 5.8 fails to meet the requirements, one association failure will be counted;

b) If the components are damaged, soldered, open circuit or short circuit, resulting in abnormal function operation, one associated failure will be counted;

c) The accidental shutdown or abnormal operation of the program, but without any maintenance and adjustment, it can be restored to normal after restarting.

6.3 Factory inspection

6.3.1 The factory inspection shall be carried out by the quality inspection department of the product manufacturer.

6.3.2 For mass-produced or continuous-produced products, all ex-factory inspections shall be carried out. If all inspection items are qualified, it shall be judged as qualified;

If any of the items are unqualified, the product is judged to be unqualified.

7.1 Product identification

The interrogation synchronous audio and video recording system should be marked with the manufacturer's name, address, product standard number, logo approval number, production date, trademark and model.

7.2 Electrical identification

The part of the machine that is directly connected to the power grid should be marked with the nature of the power supply, rated power supply voltage (or operating voltage range), frequency and power consumption.

7.3 Packaging Identification

The outer box of the product should have the following signs.

a) Product name, model, manufacturer's name, address and implementation standard number;

b) Trademark name, registered trademark pattern;

d) Packing quality. kg;

e) Maximum external dimensions of the package (L×D×H). mm;

f) The graphic signs of packaging, storage and transportation such as moisture-proof, upward, handling with care, and stacking layers shall comply with the provisions of GB/T 191-2008.