Audio Video Transmission Device Wireless Microphone Signal Synchronization
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Solution Overview
Problem
In video shooting scenarios, especially where the audio signal source is far from the camera device, the built-in microphone's poor performance and noise interference from camera components compromise the quality of the acquired audio signal, making it difficult to achieve synchronized and high-quality audio and video transmission.
Innovation Solution
An audio and video transmission system that includes a wireless microphone transmitting device connected to an external wireless microphone and an audio and video transmission device, which receives the audio signal, synchronizes it with the video signal, and transmits a mixed audio and video signal to a video receiving end, allowing for improved audio signal quality and simultaneous transmission of both signals over a wireless channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a built-in microphone is used in the camera device, then the device structure is simple, but the audio signal quality deteriorates when the distance between the audio source and camera is far
Solution Approach 1:
The system divides the audio acquisition function from the video acquisition device. An external wireless microphone is used to acquire audio signals separately, then the audio signal is transmitted to the video acquisition device for mixing with the video signal. This segmentation allows the audio acquisition to be optimized independently from the camera structure.
2Measurement precision
If the wireless microphone is directly connected to the video acquisition device, then the audio signal quality is improved, but the device complexity increases
Solution Approach 1:
The video acquisition device performs multiple functions: it acquires video signals, receives and processes audio signals from the wireless microphone, synchronizes audio and video signals, and outputs the mixed audio-video signal. By making the video acquisition device multi-functional, the system avoids adding separate dedicated audio processing equipment, thus controlling complexity.
3Ease of operation
If the audio signal is transmitted wirelessly to the video acquisition device, then the installation flexibility is improved, but the transmission reliability may deteriorate
Solution Approach 1:
The video acquisition device acts as an intermediary that receives the wireless audio signal, synchronizes it with the video signal, and outputs the combined signal. This intermediary approach allows the system to benefit from wireless installation flexibility while maintaining reliability through proper signal synchronization and processing.
Data Source
AI summary
Audio and video transmission device and audio and video transmission system are provided. The audio and video transmission system includes an audio and video transmission device and at least one wireless microphone transmitting device. Each of the at least one wireless microphone transmitting device is configured to send an audio signal acquired by a wireless microphone to the audio and video transmission device. The audio and video transmission device is configured to be respectively connected to the wireless microphone transmitting device and an external video acquisition device and configured to: receive the audio signal from the wireless microphone transmitting device and transmit the audio signal to the video acquisition device, obtain a mixture signal generated by the video acquisition device from the audio signal and a video signal, and process and output the mixture signal.