Chrominance, Sync & Deflection Circuits in Video Monitors
6.13 Chrominance Process:
To start, the signal is given by the video control block. This signal goes through a 4.43 MHz bandpass filter, which removes luminance and sync components. The filter output will only signal corresponding to the color information of the image.
Once extracted, the chroma information is taken to the chroma control block, which controls the signal’s amplitude, resulting in varying saturation.
The PAL demodulator consists of a 64 microsecond delay line, an adder, and a subtracter.
Read MoreExpert Systems: Components, Advantages, and Reengineering
1. Force of Expert Systems
Diagnosis: Obtaining a ruling from observable characteristics (symptoms, sensors, etc.).
Prediction: Deducing possible consequences from a given situation.
Interpretation: Converting information from physical sensors into a logical description.
Planning: Developing a sequence of actions to be implemented in a particular temporal order.
Monitoring: Contrasting solutions from an expert system with planned withdrawals.
Education: Diagnosing, treating, and repairing the behavior
Read MorePeripheral Devices: Types, Interfaces, and Classifications
Peripheral Devices
1. Types of Peripherals
One of the main functions of an operating system is to control the computer’s peripheral input/output. The operating system sends commands, determines which device needs the processor’s attention, and eliminates potential errors. Peripherals, which manage information, are classified as follows:
- Block Peripherals: These handle information in fixed-size blocks, transferring data to and from memory in block form.
- Character Peripherals: These input data as individual
Introduction to Computer Architecture
Direct Memory Access (DMA)
Direct Memory Access (DMA) is a feature of computer systems that allows hardware components to access the main memory (RAM) directly, without involving the CPU for every data transfer operation. This mechanism is crucial for efficient data handling, particularly in high-speed devices like hard drives, network cards, or graphics cards, where frequent data transfer is required.
Basic Concept of DMA
In a typical data transfer operation without DMA, the CPU manages every read
Read MoreUnderstanding Virtual Channels, Cell Size in ATM Switching, and Radiocommunication Principles
There is the concept of a virtual channel and a virtual path.
- To grant the sequence of packets. Although there are no specific control mechanisms, cells maintain their order within virtual channels, preserving their positional sense.
- Congestion control and flow over the network:
- Strategies are incorporated to manage cell selection and discarding in connections causing network congestion.
- Users can be notified of congestion by flags in the delivered cells.
- Control of delayed cells delivered: It is possible
Introduction to Computer Networking: Transport and Application Layers
Transport Layer Overview
The Transport Layer provides logical communication between application processes running on different hosts. The main transport layer protocols are TCP (Transmission Control Protocol) and UDP (User Datagram Protocol).
- Send Side: Breaks application messages into segments and passes them to the network layer.
- Receive Side: Reassembles segments into messages and passes them to the application layer.
Comparison with Network Layer
- Network Layer: Provides logical communication between