Serial Video Packet Encoding for Variable Gradation Bit Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional video signal transmission systems cannot support changes in the number of gradation bits of a video signal, leading to an increase in the number of signal lines required.
Innovation Solution
A video signal transmission device that packetizes and encodes signals based on the number of gradation bits, using a serializer to convert signals serially and a deserializer to convert them back parallelly, allowing the video signal reception device to determine the number of bytes per packet from the pulse width of the control signal, thereby supporting changes in gradation bits without increasing signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a signal line is used for each signal between the video signal transmission device and video signal reception device, then the transmission of video signals, sync signals and data-enable signals is ensured, but the number of physical signal lines increases
Solution Approach 1:
The patent combines multiple signals (video signals, sync signals, data-enable signals, and control signals) into a single signal line by packetizing them into data packets. The serializer converts parallel packet signals into a serial signal that can be transmitted through one physical connection, thereby reducing the number of signal lines while maintaining reliable transmission of all necessary signals.
2Device complexity
If the number of bytes of a packet for each pixel is fixed, then the signal transmission is simplified, but the change in the number of gradation bits of the video signal cannot be supported
Solution Approach 1:
The patent implements a dynamic packet structure where the number of bytes per packet can be adjusted according to the number of gradation bits of the video signal. The packer generates packet signals with variable byte lengths based on the video signal characteristics, and the control signal includes pulse width information that indicates the packet size. This dynamic adaptation allows the system to support different gradation bit depths (e.g., 8-bit, 10-bit, 12-bit) without requiring a fixed packet structure.
3Reliability
If the number of gradation bits of the video signal increases, then the video signal quality is improved, but the number of bytes of a packet for each pixel increases
Solution Approach 1:
The patent addresses the increased data volume from higher gradation bits by transitioning from parallel transmission to serial transmission. The serializer converts multiple parallel packet signals into a single serial signal stream, effectively moving the data transmission from a spatial dimension (multiple parallel lines) to a temporal dimension (serial sequence). This allows high-quality video signals with more gradation bits to be transmitted without proportionally increasing the number of physical signal lines or the complexity of the transmission interface.
Data Source
AI summary
A video transmission device 10 has: a packer 11 which receives a video signal, a sync signal, and a data-enable signal, and generates a plurality of packet signals by packetizing the video signal and the sync signal based on the data-enable signal and according to the number of bytes of a packet corresponding to the number of gradation bits of the video signal; an encode unit 15 which generates a plurality of encoded packet signals by encoding the plurality of packet signals; and a serializer 14 which generates a serial packet signal by parallel-serial converting the plurality of encoded packet signals. The packer 11 generates a control signal including a pulse with a pulse width corresponding to the number of bytes of the packet, and the encode unit 15 subjects a portion of the packet signals corresponding to the pulse in the control signal from the packer, to an encode process which is different from a process for the other portion.