Video Playing Device Pre-setting Circuit Timing Control
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Solution Overview
Problem
Conventional video players may generate incorrect video signals if the video setting process is not completed at the right time, leading to incorrect picture display, especially when the decoder decompresses frames before or after the setting parameters are generated and transferred to the TV encoder.
Innovation Solution
A video playing device with a TV encoding circuit, a pre-setting circuit, and a video processing circuit, where a pre-setting signal is enabled before encoding a second picture, allowing the video setting process to be executed before encoding, ensuring correct parameter generation and display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the video setting process generates and transfers setting parameters to the TV encoder in advance, then the TV encoder can prepare for encoding, but the decoder may not have decompressed the corresponding frame, resulting in incorrect video signal generation
Solution Approach 1:
The controller activates the video setting process in advance before the TV encoder needs to encode the picture. The process monitors the decoding status and only generates setting parameters when the corresponding frame has been successfully decompressed by the decoder, ensuring both timely preparation and correctness of video signals
2Reliability
If the video setting process waits until the frame is decoded before generating setting parameters, then the video signal correctness is ensured, but real-time display may be compromised
Solution Approach 1:
The controller continuously monitors the decoding status of frames and uses this feedback information to determine the optimal timing for activating the video setting process. This feedback mechanism ensures that setting parameters are generated at the precise moment when the corresponding frame is ready, maintaining both video signal correctness and real-time display capability
3Adaptability or versatility
If the controller manages video setting timing manually, then flexibility in handling different decoding scenarios is achieved, but system complexity increases
Solution Approach 1:
The controller automatically determines when to activate the video setting process by monitoring decoding status itself, without requiring external control signals or complex manual intervention. This self-service approach provides adaptability to different decoding scenarios while keeping the control system relatively simple
Data Source
AI summary
A video playing device includes a TV encoding circuit, a pre-setting circuit, and a video processing circuit. The TV encoding circuit encodes a first picture and generates a VSYNC signal. The pre-setting circuit is electrically connected with the TV encoding circuit, and receives the VSYNC signal to set a pre-setting signal. The pre-setting signal is enabled before the TV encoding circuit encodes a second picture. The video processing circuit is electrically connected with the pre-setting circuit, and receives the pre-setting signal to execute a video setting process for setting the video playing device to play the second picture. The video setting process is completed before the second picture is encoded. The pre-setting signal is adjustable such that the video setting process is completed before the second picture is played.