Introduction to Sequential Scanning or Progressive Scanning
The electron ray begins to scan from line one and follow constantly (trace line and retrace line) making full scanning of 15625 in a second is termed as progressive scanning. In this technique there was a not avoidable problem happened.
FLICKER EFFECT:
Even though the rate of 24 pictures per second in motion pictures and that of scanning 25 frames per second in television pictures is sufficient to cause an fantasy of continuity, they are not sufficiently fast to permit the brightness of one picture or frame to blend smoothly into the next by the time while the screen is blanked among successive frames. This out comes in a specific flicker of light which is extremely annoying to the observer while the screen is made alternately bright and dark.
This difficulty is solved in motion pictures through displaying each picture twice that are why 48 views of the scene are displayed per second even though there are still similar 24 frames per second. The result of the raised blanking rate, flicker is removed.
INTERLACED SCANNING:
In television pictures are effective rate of 50 vertical scenes each second is used to decrease flicker. This is accomplished through raising the downward rate of travel of the scanning electron beam that is why every alternate line gets scanned in place of each successive line. After that, while the beam arrives at the bottom of the picture frame, it rapidly returns to the top to scan those lines which were missed in the preceding scanning. So the total numbers of lines are separated into two groups that are known as 'Fields' V Each field is scanned alternatively. This technique of scanning is termed as interlace scanning and is demonstrated in the diagram It decreases flicker to an acceptable level because the area of the screen is covered at two times the rate. This is similar to reading alternate lines of a page from top to bottom one time and after that going back to read the left over lines down to the bottom.
In the 625 line monochrome system, for very successful interlaced scanning, the 625 lines of every frame or picture are divided into sets of 312.5 lines and each set is scanned alternating to cover the entire picture area. To attain this the horizontal sweep oscillator is ready to work at a frequency of 15625 Hz(312.5/25 = 625 lines), however the vertical sweep circuit is run at a frequency of 50 in place of 25 Hz. Note : because the beam is now deflected from to top bottom in half the time and the horizontal oscillator is yet operating at 15625Hz, only half the total lines, that is 312.5(625/2=312.5) get scanned in each vertical sweep. Because the in a half line first field ends and the second field commences at middle of the line on the top of the target plate or screen, the beam is capable to scan the left over 312.5 alternate lines throughout downward journey of it. In total then, the bean scans 625 lines (312.5X2=625) per frame at similar rate of 15625 lines (312.4X50=15625) per second. Hence, with interlaced scanning the flicker effect is removed with no increasing the speed of scanning that in rum does not require any raise in the channel bandwidth.
Latest technology based Electrical Engineering Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in Sequential or Progressive Scanning homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for Sequential or Progressive Scanning, project ideas and tutorials. We provide email based Sequential or Progressive Scanning homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in Sequential or Progressive Scanning. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Electrical Engineering homework help and assignment help services. They use their experience, as they have solved thousands of the Electrical Engineering assignments, which may help you to solve your complex issues of Sequential or Progressive Scanning. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
the computer based system has been introduced in the market, many years ago. it has made its powerful place in some decades of time.
practical applications of electrolysis tutorial all along with the key concepts of purification of copper, electroplating, preparation of sodium hydroxide, quantitative electrolysis, corrosion of metals, rusting of iron, methods used to prevent corrosion
www.tutorsglobe.com offers redox reactions homework help, redox reactions assignment help, online tutoring assistance, physical chemistry solutions by online qualified chemistry tutor's help.
Composition of Crude and Natural gas tutorial all along with the key concepts of Hydrocarbon Compounds, paraffins, Cycloparaffins, Aromatic Compounds, Non-Hydrocarbon Compounds, Sulphur Compounds, Nitrogen Compounds, Oxygen Compounds, Properties of Crude Oil and Crude Oil Classification
tutorsglobe.com premenstrual phase assignment help-homework help by online menstrual cycle tutors
www.tutorsglobe.com offers butane homework help, butane assignment help, online tutoring assistance, organic chemistry solutions by online qualified tutor's help.
theory and lecture notes of conics and parametric equationsall along with the key concepts of conics and parametric equations, parabola, circle, ellipse, hyperbola, standard forms of conics. tutorsglobe offers homework help, assignment help and tutor’s assistance on conics and parametric equations.
Synthetic Polymerization tutorial all along with the key concepts of procedure of polymerization, Synthetic polymer materials, Addition polymers
Types and Effects of Linkages on Nature of Polymers tutorial all along with the key concepts of Types of linkages in the polymer, Cross-linkings, Bakelite is a commercially important polymer, Implications of cross-linking in polymers, More properties of polymers
The water heaters’ heating element converts electric energy into heat through which water inside the heater gets heated because of convection.
Atomic and Molecular Structure tutorial all along with the key concepts of Atomic and Molecular Structure, Structure of the atom, About elements, Nuclei
tutorsglobe.com glycolysis assignment help-homework help by online energy and enzymes tutors
tutorsglobe.com financial management below limited resources assignment help-homework help by online financial management tutors
tape recorder is a device that is employed to share the music in a ribbon winded in to small wheels. thus, it is termed as a tape recorder.
Other intestinal protozoa tutorial all along with the key concepts ofBalantidium coli, Cryptosporidium parvum, Isospora belli, Luminal protozoa and Trichomoniasis
1958349
Questions Asked
3689
Tutors
1470817
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!