DVD Player External Signal Format Transformation
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Solution Overview
Problem
Conventional DVD players cannot properly display high-resolution video images from analog camcorders due to format incompatibilities and resolution issues, leading to low-resolution outputs on TVs.
Innovation Solution
A DVD reproducing device with an external input receiving unit, signal processing unit, and control unit that transforms external input signals into predetermined formats and resolutions, including A/D conversion, scaling, and broadcasting format transformation, allowing for selective output via analog or digital interfaces like HDMI or DVI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional DVD player is used to reproduce video from analog camcorders, then the device can play back recorded content, but the output resolution is low and format incompatibility occurs
Solution Approach 1:
The patent applies parameter changes by transforming the signal format and resolution parameters of external input signals. The external signal processing unit converts analog signals to digital format, adjusts resolution levels, and transforms broadcasting formats (NTSC/PAL/SECAM) to match the display device requirements, thereby achieving high-resolution output while maintaining format compatibility
Solution Approach 2:
The patent implements universality by enabling the DVD player to handle multiple signal types (analog and digital), multiple broadcasting formats (NTSC, PAL, SECAM), and multiple resolution levels. The external signal processing unit serves as a universal interface that can process various external input signals from different electronic devices and output them in the appropriate format for the connected display device
2Reliability
If external input signals are transformed through multiple processing steps, then signal compatibility and resolution are improved, but device complexity increases
Solution Approach 1:
The patent applies merging by integrating the external signal processing unit within the DVD player's existing architecture. The control unit coordinates multiple processing functions (A/D conversion, scaling, format transformation) as a unified system, and the signal output unit consolidates multiple output interfaces (analog and digital) into a single coordinated output stage, thereby improving reliability without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables high-resolution, noise-free video playback from external devices by converting and formatting signals to match user preferences, effectively addressing format and resolution issues.
Implementation Method 1
The external signal processing unit may include an A/D converter to convert an analog signal received in the external input receiving unit into a digital signal
Implementation Method 2
a scaler to transform resolution of an external input signal
Implementation Method 3
a broadcasting format transforming unit to transform a signal format of an external input signal
Data Source
AI summary
A DVD reproducing device is capable of being connected to a certain external electronic device. The DVD reproducing device includes an external input receiving unit connected with the external electronic device to receive an external input signal from the external electronic device. A key input receiving unit receives a user selection signal for selecting whether or not the external input signal is transformed. An external signal processing unit transforms the external input signal into a certain form according to a user selection signal. A control unit controls the external signal processing unit such that when an external input signal is received through the external input receiving unit, a received signal is transformed into a signal form predetermined by a user selection signal; and a signal output unit outputs the external input signal transformed at the external signal processing unit, whereby a signal inputted from the external electronic device is transformed into an optimal form to be displayed on the video display device.