【School】 video conferencing weak debugging techniques and skills --- Power By 【China】 weak home network.

<br> <BR> video conferencing is the image, the sound combination, in order to obtain the desired results, we must make preliminary preparations in accordance with operating procedures and debugging. .In practice, there are many unsatisfactory areas, mainly in the parameter setting and practical aspects. .How to be aware of, handy? .This article discusses the technical problems, propose different solutions and application skills. .First, the adjustment of the video in the video <BR> debugging process, the common problem is the image without color and image color cast. .For the image without color phenomenon, the terminal control software by meeting the parameters set to be resolved; for the phenomenon of image color cast, white balance adjustment to be adopted to correct for light source color temperature changes caused by the image color cast. .The venue should avoid using mixed light (indoor lighting, outdoor direct sunlight and scattering) as a light source, light mix of different color temperature, will not be the ideal color reproduction, so try to avoid the existence of two or more at the venue .different color temperature light sources. .The use of video conferencing camera, the method can be eliminated by rebooting; if using professional cameras, white balance adjustment can be resolved through the specific method is: According to the venue select the appropriate color temperature of light source color temperature filter, automatic white balance .adjusted to ensure accurate color reproduction. .<BR> During the meeting, to be displayed at the venue around the screen, if at the venue a "push", "pull", "shake" technique to capture, the specific problems for the motion picture performance is not consistent, uniform velocity ., off the piece of the screen is not in place. ."Push" is to move closer to the subject line of sight, the overall lead by a local, highlighting a particular part of the whole; "pull" by the local lead entity, in which the demonstration of a local environment; "Shake" is divided into left .shake shake and right. ."Push" and "pull" is the lens and contains the same features, close-range, medium shot, panoramic picture, emphasizing the drop rate, so drop pieces of the picture composition is particularly important, which is a measure of the standard screen is in place. .Either way, shooting techniques, should ensure stability and continuity of the screen, the screen should be to stabilize the site as a play, and to stabilize the screen as the drop rate, and have a long enough time to ensure that the picture is relatively static .This is the psychological demands, and lens group of people need access. .No destination urgent push jerk, a sudden shift, half-way stop, will be the audience and the turmoil caused by abnormal visual experience the feeling, mainly due to operational errors and the effect of the screen caused by the delay. .<BR> Terminal control software for the use of session control, and to carry out manually. .For example, to the "push" (or pull) the action, the first good drop rate structure of the screen, then "pull" (or push) to the panoramic, when the master control room to switch to the side of the screen, then click the mouse, the .Release the mouse at the drop site; To make a "shake" action, the first good drop rate of the screen structure, when the master control room to switch to the side of the screen, then press the mouse left or right shake shake, at the drop site at the Pine .Open the mouse. .However, in practice, because the camera's limited seats, "shake" down piece of the screen action is not ideal. .For the use of professional camera control, the way to the use of electric zoom, press the T (push) or W (pull) needed to complete the shooting skills. .Press the zoom button as the severity of change within a certain range can zoom speed, so the power zoom button press should be uniform, otherwise the process is not uniform for the zoom. .<BR> Is worth noting that the existence of the video conference screen lag effect, the operator during the "push" or "pull" or "shake" the action prone to illusion. .For example, when the master control room to switch to the side of the screen, the operator began to "push" or "pull" or "shake" in action, but in the remote screen is not immediately apparent that the action of the change process, to mistakenly believe that .Action error occurred, and stop the action of the process leading to the motion picture half-way stop; blink of an eye, when the remote's screen has changed the screen, the operator only to confirm the action and made no mistakes, and continue to the original .action, until the drop-rate picture. .The process of stopping a move has led to incoherent motion picture. .In addition, the picture looks down at this time the composition and the composition of the original vision has moved forward a little. .For the "push" action, the screen transition from close-range to close-up; to "pull" action, the screen transition from the panoramic to the big picture; to "shake" in action, the screen is shaking off the site to the edge of the venue. .It is for the sake of image lag effect, leading off the piece of the screen is not in place. .<BR> The result of image lag effect caused by the problem, the following methods to be addressed, specific steps are: first to monitor the remote screen, when the master control room to switch to the side of the screen, immediately, with all eyes watch the end of the screen .and to the side of the screen as a benchmark, the "push" or "pull" or "shake" action. .In the "National Organization for 'party spirit, re-conduct, for example' activities" video conference, the author through the conference terminal control software, to take manually, using the above method, completion of the "push" action, achieve continuous motion picture, .uniform speed, the purpose of off site composition in place. .Second, adjust the sound <BR> voice video conferencing an integral part of the adjustment methods and the size of the venue, environment, design and sound quality on the sound source. .To get a good sound reduction, we must fully and appropriate use of mixing and amplification equipment, make the sound to a bright, full, strong effect. .The adjustment should be based on the sound quality of the sound source, combined with the local venue for the environment, and strive to make the sound of the distortion to a minimum. .Debugging process in the audio, a common problem mainly in the following areas: <BR> 1, accompanied by the sound echo. .This is due to return to the remote signal sent remotely caused by, through meeting the terminal control software, the "echo suppression" open; if the signal sent by the remote console back to the remote after mixing, will .produce echo, cut through the strong supporting functions to receive and send voice isolation, so that AUX OFF in off state; for desktop mixer to control the auxiliary output (AUX1, AUX2) signal, if the AUX2 output .The signal sent to the video device (such as hard disk recorders, tape recorders), we must adjust the size of the road level, and the AUX1 output level to minimum, and make the remote signal is not sent to the remote feed. .<BR> 2, accompanied by the sound of "begging, begging" sound. .The reason is that the end of the mic level is too high or high frequency caused by excessive levels. .Microphone level is too high for the cause, putting the microphone can be controlled a little down, to reduce the microphone input level; for by the high level of high frequency caused, may be appropriate to adjust the treble knob to reduce the high .frequency part of the level. .<BR> 3, to receive remote voice is too small. .This is mainly the wrong side of the volume adjustment. .By the terminal control software to increase the volume, the increase in the mixer audio signal sent by the remote, the power amplifier to increase the volume and other methods to solve them. .Also, pay attention to control the pressure throughout the venue, to increase the volume to a progressive manner, avoid rapid adjustment, or easy to damage the equipment. .Also, the pitch of the sound source (treble, alto, bass) for a selective adjustment, and increase the tone and bass, vocals get full, strong effect. .<BR> 4, howling sound of the end (the self). .This is the sound feed to the speakers microphone, speaker and microphone to constitute a positive feedback between the circuits. .The main reason is too close to the microphone or the microphone from the speaker points to the speaker. .If the phenomenon of self-excitation appears to be quickly off a small microphone amplifier input level or volume, or easy to damage the device. .By changing the direction of the microphone, the microphone away from the speaker's approach to be eliminated. .<BR> Three parameters <BR> with the use of backup time, the computer's hardware or operating system damage or collapse at any time, and therefore the parameters of the backup job to do. .Backup includes terminal control software meeting the set parameters, IP address and related application software, upgrading software. .Once the equipment failure, replacement and maintenance can be timely to ensure the normal video conference was held. .<BR> Summary, technical staff to an understanding of related technologies and skilled master the common debugging and application skills. .The choice of which method should be based on device characteristics, in accordance with the actual situation of different flexibility, in order to improve audio-visual artistic expression, to video conferencing to better and more alive, more vivid. .<BR>.