Shuntai Weicheng——Procuratorate's synchronous audio and video host

视频输入：

4路HD-SDI、1路VGA、1路HDMI

视频输出：

1路VGA、1路HDMI

编码格式：

H.264High Profile

In addition to interrogation techniques, interrogation security and interrogation environment, the synchronized audio and video recording system of the procuratorate generally has to solve four technical problems: video, audio, transcript and seriousness of conversation. That is, the video image must be clear, the audio effect must be fidelity, the transcripts must be authentic, and the environment settings must be majestic. However, in addition to the recording function, the seriousness of video, audio, and conversation and the comfort of the conversation room must be achieved with the help of interior decoration. For every conversation system, image, sound, and decoration (including the arrangement of desks and chairs and the display of other items) are three-in-one projects that are closely connected to form a whole to avoid mismatches between the sound, image, environment, and the entire decoration. This creates blind spots in optics, acoustics, and film and television, making expensive equipment unable to produce good results. Indoor environment The temperature and humidity in the conversation room should be appropriate, and a certain air flow rate and fresh air volume should be maintained to keep the interviewer in a good mental state in order to achieve a higher conversation effect. Generally, the temperature is maintained at ~°C in summer, and at ~°C in winter. Humidity is kept at %~% in summer, and the air flow rate is kept at %~% in winter. The air flow rate is kept at ./fresh air volume per person per hour on average. more than the.
The interior layout takes into account the seriousness and imaging effects of the interrogation. The scenery and colors in the interrogation room, as well as the tones of the tables and chairs, must enhance the theme and serve the video. The soft packaging around the walls can be in beige, the wall skirts, tables and chairs are mainly in brown, and the ceiling can be in milky white or silver gray. From the perspective of the majesty of the interview room and the video images captured by the camera, the overall decoration color of the interrogation room should not be too fancy, and it should not be easy to have too many furnishings to prevent the overall effect from being overshadowed by too many colors.
The indoor illumination of light entering the room from the window (color temperature approx.) is higher than that of fluorescent lamps () or three-color lamps (). If there are more than two light sources (natural light sources and artificial light sources) indoors, it will affect the imaging On the other hand, the interrogation time is random, and the illumination and color temperature of natural light sources are different in the morning, noon, afternoon, cloudy and sunny days, and the gap is large. Therefore, natural light sources should be avoided indoors and artificial light sources should be used. Therefore, indoor windows should be covered with dark curtains or decorated and closed. In order to achieve the imaging effect and conversation lighting needs, three primary color fluorescent lamps should be selected to control the illumination at left and right, and the selection and installation position of the lamps should be reasonable to avoid glare and large shadow areas.
Sound processing The entire conversation process is mainly based on language dialogue. The audio frequency is between ~, the normal sound pressure level is ~, the sound power is ~, and the direct sound from the sound source is concentrated on the front and back of the case desk. In order to ensure the clarity and fidelity of the language and obtain good recording effects, the playback sound can maintain the original sound without distortion. Generally, sound insulation and strong sound absorption are used for decoration to prevent outdoor noise from entering the room, control the indoor reverberation time within the range, and deal with sound diffusion to prevent sound focusing, sound coloring and sound standing wave phenomena. . When choosing sound pickup monitoring, omnidirectional active ones are the main ones.
Company name Shenzhen Shuntai Weicheng Technology Co., Ltd.