Definitions Persistent,Resolution,Aspect Ratio

Duration: 8 min

This video lesson is available to enrolled students.

Return to /learn/DSSSB-TGT-COMPUTER-SCIENCE-COMPLETE-COURSE/computer-graphics-multimedia-mobile-computing/basics-of-computer-graphics/overview-of-display-techn/asset-definitions-persistentresolutionaspect-ratio after enrolling

Inside: a video lesson and guided study material.

Module outline

  1. About Course: About the Course
  2. Section A: General Awareness: Polity, Physics, Biology, Chemistry, Static General Knowledge, History, Geography, Indian Economy, GK- Current Affairs, Evolution of Indian Banking (Banking & Financial Awareness), Environment
  3. Section A: General Intelligence & Reasoning ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Analytical Reasoning (Counting Figures Reasoning), Blood Relations, Syllogisms, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Seating Arrangements, Directions (Direction Test), Puzzle Solving (Puzzles), Calendar, Clock, Cubes & Dices, Selection Decision Table (Decision Making), Logical Sequence Of Words, Crypt Arithmetic, Venn Diagram, Data Arrangement, Inequality, Analogy, Ranking, Order and Sequence, TCS NQT Advanced Reasoning Ability
  4. Section A: Arithmetical & Numerical Ability: Ratio and Proportion (Ratios), Divisibility Rules, Data Interpretation, Mixture and Alligation, Permutation and Combination, Logarithm, Number System, HCF LCM, Sequence and Series (Series), Speed Time and Distance, Percentage, Average, Profit and Loss, Simple Interest and Compound Interest, Time and Work, Pipe and Cistern, Mensuration and Geometry, Powers and Exponents (Surds and Indices), Algebra, Probability, Mental Ability, Age Problems, Partnership, Statistics, Arithmetic, Speed Mathematics and Basic Mathematics, Miscellaneous
  5. Section A: English Language & Comprehension: Vocabulary, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Articles, Sentence Construction, Preposition, Direct and Indirect Speech, Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Modals, Active Passive Voice (Voice), Sentence Correction (Error Correction), Adverb, Conjunction, Cloze Test (Cloze Passage)
  6. Section A: Hindi Language & Comprehension: भाषा, लिपि, ध्वनि, वर्ण, अक्षर, स्वर, व्यंजन, मात्रा और संयुक्ताक्षर, वर्तनी, वर्ण-विन्यास, अनुस्वार, अनुनासिक, चंद्रबिंदु और ‘र’ के रूप, शब्द, पद और शब्द-भेद, संज्ञा और सर्वनाम, विशेषण और क्रिया, लिंग, वचन, पुरुष और कारक, काल, वाच्य, वाक्य और वाक्य-भेद, संधि, समास, विलोम शब्द, पर्यायवाची शब्द, सामान्य अशुद्धियाँ, अनेक शब्दों के लिए एक शब्द, मुहावरे और लोकोक्तियाँ, अपठित गद्यांश और अपठित पद्यांश, Multi-Topic Content (Cross-Concept Material), वर्णमाला
  7. Section B: Programming, Data Structures, OOP & Java: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Java, OOPS with C++, Language Design, Intro to Compilers, Visual Basics, Syntax Analysis: Bottom-Up, Object Oriented Technology
  8. Section B: Computer Networks, TCP/IP & Network Security: Introduction to CN, Data Communication, DLL: Flow Control, DLL: Access Control, DLL: Error Control, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Access Technologies, Network Security, Society, Law & Ethics, Mobile Computing, Net Layer:Routing Protocol, Cyber Safety and Security
  9. Section B: Teaching Methodology: Child Development, Concept of Pedagogy, Theories, Inclusive Education, Experiential Pedagogy, Assessment & Evaluation, Curriculum Framework & Reforms, National Education Policy (NEP) 2020, Psychology, Teaching-Learning Process, Personality Development, Teaching Methods & Strategies, Learning and Motivation, Learners & Learning Process, Factors Affecting Teaching, Methods of Teaching, Nature, Objectives & Characteristics of Teaching, Teaching-Learning Aids & ICT Integration, Classroom Management & Communication, Evaluation, Assessment & Measurement, Curriculum & School Environment, Inclusive Education & Special Needs, Professional Development & Ethics
  10. Section B: Digital Electronics / Boolean Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Analog-Digital Conversion
  11. Section B: Operating Systems & Linux: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, File Management, Disc Scheduling, Unix OS, Linux OS, Distributed Systems, Windows OS
  12. Section B: Data Base Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, File Organization & Indexing, Transaction Management, Concurrency Control, Database Security & Authorization, Database Recovery, Data Warehousing & Mining
  13. Section B: Internet & Web Technologies: Website, Browser & Services, Internet Fundamentals, Web Design & Development, Protocols & Services, Web Publishing & Hosting, Server Side & Security, HTML Basics, CSS, Emerging Technologies, JavaScript-Basics, .Net Programming, Electronic Data Interchange and E-Commerce, XML
  14. Section B: Computer Fundamentals, IT Basics & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer, Terms & Abbreviations, MS Office Applications, Instr Formats & Modes, Floating Point Rep
  15. Section B: Python Language: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  16. Section B: Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management, extras, Fundamentals of Systems and Information Systems
  17. Section B: Design & Analysis of Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos, Advanced Algorithms
  18. Section B: Mathematics: Linear Algebra, Calculus, Trigonometry, Vectors, Set Theory, Functions, Relations, Propositional and Predicate Logic, Research Process Steps, Graph Theory
  19. Section B: Computer Graphics, Multimedia & Mobile Computing: Basics of Computer Graphics, 2-D Geometrical Transforms and Viewing, 3-D Object Representation, Geometric Transformations and Viewing, Multimedia
  20. Section B: Emerging Trends: Emerging Tech Trends, Knowledge Representation, Natural Language Processing
  21. DSSSB Previous Year Paper:
  22. Business Studies and Management: Business Communication, Business Organization and Management, Financial Accounting, Business Economics, Management Information System (MIS), Knowledge Management & New Economy
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video is a lecture on fundamental concepts in computer graphics, presented as a PDF document on a screen with a presenter in a small window. The lecture begins by defining and explaining three key terms: Persistence, Resolution, and Aspect Ratio. For Persistence, the definition provided is "the time it takes the emitted light from the screen to decay to one-tenth of its original intensity," with a discussion on how low and high persistence phosphors are used for animation and static pictures, respectively. The concept of Resolution is defined as the maximum number of points that can be displayed without overlap on a CRT, which is also described as the number of points per centimeter. Aspect Ratio is defined as the ratio of an image's width to its height, commonly expressed as two numbers separated by a colon (e.g., 16:9). The lecture then transitions to a practical example, presenting a question to calculate the aspect ratio of a raster system with an 8x10 inch screen and a resolution of 100 pixels per inch. The instructor demonstrates the calculation, showing that the aspect ratio is 4:5, derived from the formula (8 * 100) / (10 * 100). The video uses on-screen text, diagrams, and handwritten annotations to illustrate these concepts.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The video opens with a presentation slide titled "Some terms related to Graphics" displayed on a computer screen. The slide lists three main topics: Persistence, Resolution, and Aspect Ratio. The instructor begins by defining Persistence as "the time it takes the emitted light from the screen to decay to one-tenth of its original intensity." The text on the screen also explains that lower persistence phosphors require higher refresh rates to avoid flicker and are useful for animation, while high-persistence phosphors are used for static pictures. The instructor's voiceover explains these definitions, and the on-screen text is clearly visible, providing the core definitions for the first concept.

  2. 2:00 – 5:00 02:00-05:00

    The lecture continues with the definition of Resolution. The on-screen text states that the maximum number of points that can be displayed without overlap on a CRT is referred to as the resolution, and it is also the number of points per centimeter that can be plotted horizontally and vertically. The instructor explains this concept, and the text is clearly visible. The discussion then moves to Aspect Ratio, defined as the ratio of an image's width to its height. The text explains that it is commonly expressed as two numbers separated by a colon, such as 16:9, and provides examples of widely used aspect ratios in film, television, and photography. The instructor's voiceover elaborates on these points, and the on-screen text provides the necessary definitions and examples.

  3. 5:00 – 8:03 05:00-08:03

    The video transitions to a worked example. A question appears on the screen: "Find out the aspect ratio of the raster system using 8 x 10 inches screen and 100 pixel/inch." The instructor begins to solve this problem. The on-screen text shows the formula: Aspect ratio = Width / Height. The instructor writes out the calculation: (8 x 100) / (10 x 100), which simplifies to 800 / 1000, resulting in an aspect ratio of 4:5. The instructor verbally confirms this calculation, and the final answer is clearly displayed on the screen. The video concludes with the completed solution, demonstrating the application of the previously learned concepts.

The video provides a structured and clear explanation of three fundamental concepts in computer graphics: Persistence, Resolution, and Aspect Ratio. It begins with formal definitions from a presentation slide, using the on-screen text as the primary source of information. The lecture then progresses to a practical application by presenting a problem that requires the calculation of an aspect ratio. The instructor methodically demonstrates the solution, using the formula derived from the definition of aspect ratio. This progression from theory to practice effectively reinforces the concepts, making the material accessible for students. The use of on-screen text, diagrams, and handwritten annotations enhances the learning experience by providing multiple visual cues for the key information.

Loading lesson…