When was the video recorder invented?

Question 1: Who invented the video recorder 1928 10? A man named Finch? British people in Bayette applied for the patent of video recording, and made a trial record, which was publicly sold in the mid-1930s. The price at that time was equivalent to 35p. In the production process, Bayette first converted the 30-line scanned image into an intermediate frequency signal through a special mechanism, and then carved a spiral groove on the video recorder like making a record. This video recorder must be used with TV sets and record players (including pickups).

Just when people were curious about Bayette's system, Zhiqiaolufu, a Russian scientist living in Britain, proposed a method of recording TV signals by electromagnetic means. 1927,65438+year1October, he imagined the steel wire recording technology invented by Polish polson, which can not only record audio, but also record images. Although Britain patented the idea of Zhiqiaoluf, it was not put into practice. Because he can't afford to pay the annual patent fee.

Mechanical video recording can only record 30 lines of scanned images, but in 1936, the number of lines of black-and-white TV sets has grown to 405 lines, and later the number of lines of color TV sets has grown to 625 lines, which is a fatal blow to mechanical video recording, because mechanical scanning cannot reach such a fast speed.

People try to make TV video equipment through electronic scanning. In the mid-1950s, the BBC made an electronic video recorder, which had two large tape reels, and the tape passed through a fixed video head at an amazing speed of 5 meters per second. Although it can be replayed live, it is very clumsy and impractical, so it is out of date before it is successful. Soon it appeared in the stalls of electronic processing products on the streets of London and was sold as a part, thus ending its life.

1956 in April, Ann Panks of the United States exhibited the first experimental video recorder at the National Broadcasting Association of the United States, which made a new breakthrough in technology. The width of the tape is 50 mm, and the speed of the tape is slowed down to 39.7 cm per second. The magnetic tape passes through a magnetic drum with four heads, and the rotating speed of the drum disk is 250 revolutions per second, so that the four heads can scan the entire width of the magnetic tape obliquely. Left a series of magnetic tracks. FM video recording is used here instead of the previous AM video recording method. Ann Panks's first video recorder was worth $75,000, which was bigger than a car.

Video recorder is the most sophisticated and complicated structure in household appliances. For example, when assembling the heart of a video recorder, that is, the drum disk, the error should not exceed the width of a hair. At present, there are 2500 discrete components and more than 5500 terminals in the video recorder, including 30 integrated circuits. The components used in the whole machine are equivalent to 40 thousand transistors. If you don't use integrated circuits, you need a 4 square meter ordinary printed circuit board. In contrast, a color TV is much simpler, with only 350 components. When recording and playing color TV programs, if the tape speed is 2 cm per second, the amount of information is equivalent to the total amount of information when 200 tape recorders or 1000 telephones work at the same time. No wonder some people call the video recorder "the most complicated machine in the family".

Question 2: When was the earliest camera in the world and who invented it? The earliest movie camera in the world was invented by French physiologist Le Marley in 1880 and 10.

The earliest movie camera in history.

Jules, France, 1874? Let Sang invent the camera. He wound the photosensitive film on a toothed film supply reel. Under the control of the pendulum mechanism, the film supply tray moves intermittently in the circular film supply box, and the pendulum mechanism drives the shutter to rotate. Every time the film stops, the shutter will open for exposure. Janssen connected this camera to a telescope, which can take a set of photos of planetary motion at the speed of one per second. Janssen named it a photographic gun, which is the originator of modern movie cameras.

1882, Jules, France? Marley invented the camera, which can shoot the coherent movements of birds, thus giving birth to photography technology. This camera is shaped like a gun. A round box similar to a large magazine is fixed at the trigger, and a large caliber barrel is installed in front. A glass photosensitive disc coated with silver bromide emulsion is installed in the round box. When shooting, the photosensitive disc intermittently moves in a circle, and the shutter is coaxial with the photosensitive disc and keeps rotating, blocking and absorbing the light beam passing through the lens. The whole machine is driven by a clockwork. You can take photos with the exposure speed of1100 seconds and the frequency of 12 photos per second. 1888, Marley invented a new camera. He replaced the fixed photosensitive disc with a photosensitive paper tape wound on the shaft. When the photosensitive paper tape passes through the focus of the lens, two color grasping mechanisms fix the photosensitive paper tape to expose it. Later, Marley replaced the photosensitive paper tape with photosensitive film. Marley's camera has been continuously improved, and finally it can shoot 60 shots per second on 9 cm wide film.

1889, Edison in America invented the camera. This camera is driven by a pointed roller 19mm wide non-porous adhesive tape. Under the control of a ratchet wheel, it drives the adhesive tape to move intermittently and punch holes at the same time. This camera is driven by a motor, the shutter shaft is linked with the phonograph, and the phonograph records the sound when the camera is running. On this basis, the mobile camera was invented. There is a cross wheel mechanism in the camera to control the intermittent motion of the film, and another gear drives the film forward. This camera uses 35 mm perforated film. 189 1 year, Edison obtained the patent of this mobile camera.

The first movie camera made by Marley.

Edison's mobile viewing machine can hold 16 meters of film, which can be watched by one person at a time.

1879, mcbride designed this kind of movable projector, which can be used to show pictures of activities.

Edison invented the first film projector. The film was rolled on a cylinder and viewed from the eyepiece.

Question 3: When did the camera appear? It is the world's first practical video camera introduced by Ampex Company of the United States, which has opened a new era of image recording. At that time, cameras used camera tubes to capture images. The camera tube not only has short service life, high manufacturing cost and unstable performance, but also can't shoot under strong light, so the camera never enters the home.

1At the end of 1970s, JVC introduced the first home video camera, and at the same time, it also introduced the VHS format (high-density video format, known as 1/2 video recorder and 1/2 video tape in China) independently developed by JVC.

However, electronic cameras existed before this.

Baird, Scotland, 1925, after careful design, uses old radio equipment, old candy boxes, bicycle lamp lenses, old wires and other waste materials to manufacture the world's most primitive TV cameras and receivers. 1On October 27th, Baird presented his invention to 40 scientists at the Royal Society in London, England. He put a TV in one room, and the scientists watched TV in the other room. The picture of a man talking while smoking appears on the screen. This performance was later recognized internationally as the first public television broadcast.

From 65438 to 0929, American scientist eves played 50 lines of color TV images between new york and Washington, and invented color TV. 1933, Zworykin successfully developed camera tubes and picture tubes for TV camera shooting. The process of making TV camera and imaging completely electronic has been completed, and so far, the modern TV system has basically taken shape. Today, the imaging principle and equipment of TV cameras and TV receivers are improved according to his invention.

1936165438+1On October 2nd, the British Broadcasting Corporation (BBC) broadcast a large-scale song and dance program in Alexandria Palace, a suburb of London, and launched a two-hour TV broadcast for the first time. The coverage of the Berlin Olympic Games that year was a great appearance of young TV career. At that time, * * * used four cameras to shoot the game. One of the most striking is the all-electronic camera. This machine is huge. The lens with a focal length of 1.6m weighs 45kg and is 2.2m long.

Question 4: When did the video recorder first appear in Shanghai? In the late 1970s (about 78.79 years after the end of the Cultural Revolution), video recorders began to appear.

Question 5: When was camera technology invented? What is the earliest video material? What's the difference between a movie camera and a TV camera?

Cameras, camcorders, and digital cameras In China, there are film machines, video tapes, compact discs, and hard disk quality circle activity recorders that strictly distinguish cameras, which are widely used in TV program production, family and other aspects. The camera used and the mechanical device used, the camera that records the moving image by optical and chemical recording is electronic recording, at this time, the camera and the video camera record in the same way, but the recorded image is fixed. 1895 Lumiere, who was born in Paris, invented the first camera. 1936 American manufacturing collectively invented the world's first practical movie camera.

Question 6: When were the earliest tape cameras and digital cameras invented respectively? What's the difference between a movie camera and a TV camera?

In China, there is a strict distinction between cameras, video cameras and cameras. A camera refers to a machine that shoots movies with film. A camera is a machine that records moving images with magnetic tapes, optical disks, hard disks, etc. , widely used in TV program production, family and so on. The camera uses mechanical devices to record moving images, uses optical and chemical recording methods, and uses electronic recording methods. Cameras and camcorders record in the same way, but the recorded images are fixed. The world's first practical film camera was born in 1895 in Paris, France. It was invented by Lumiere. The first camera was made by Americans in 1936 and was invented collectively.

Question 7: Who invented the camera and when? More than 40 years ago, Ampex Company of America introduced the world's first practical camera. At that time, the camera tube was used as the camera element, which became the most fatal weakness in terms of low life, unstable performance and high manufacturing cost, which limited its application in professional fields and failed to be used in civil fields. JVC first introduced VHS camera 1976, and JVC Company introduced the first home camera, which adopted the VHS format independently developed by JVC. VHS is the abbreviation of video home system, which means video home system.

Question 8: Who invented the video recorder? 1956 American Ampex Company invents video recorder.

Question 9: Who invented the digital camera? 1975, in Kodak laboratory in Rochester, new york, USA, the black-and-white image of a child and a puppy was captured by CCD sensor and recorded on an audio tape. This is the first digital photo taken by the first digital camera in the world, and the development of the image industry has changed. Thirty years later, the inventor of the first digital camera came to China to look back on that period of history and look forward to the future of digital images with his keen insight. Steven Sasson joined Kodak after graduating from 1973 as an engineer in the applied electronics research center. 1974, he undertook the important task of inventing the "handheld electronic camera". The following year, the first prototype was born in the laboratory, and he became the "father of digital cameras". The purpose of this project is to shoot images without film. Its prototype product is only/kloc-0.0 million pixels, and its imaging is very rough. Speaking of that history, Cezanne still remembers it vividly: "At that time, digital technology was difficult, CCD was difficult to control, A/D converter was difficult to manufacture, digital storage media was difficult to obtain, and the capacity was very small. There was no PC at that time, and the playback equipment needed to be tailored. These difficulties took us 1 year to install this camera. " At that time, digital cameras were still a very small project for Kodak. Because of the decision to adopt digital method, there is not much moving machinery in the camera. Cezanne and two technical engineers completed the project. When choosing a removable digital storage medium, Cezanne hoped that its storage capacity would be similar to that of 35mm film, so he finally adopted a universal cassette recording tape, which can basically store 30 photos equivalent to a film. "At that time, many technologies were very new. The circuit board of this prototype can be tuned while shooting. " Cezanne seems to have returned to the laboratory. Growing up in the infancy of technology "When the prototype was first shown to investors, they asked when this product would become a consumer product, and I replied that it would take about 15 ~ 20 years for this product to enter the families of ordinary consumers." Cezanne's judgment is quite accurate. The development of digital cameras is a long road. From the end of 1970 to the beginning of 1980s, Kodak Lab produced more than 1000 patents related to digital cameras, which laid the foundation for the current architecture and development of digital cameras, and made digital cameras move towards display step by step. 1989, Kodak finally launched the first commercial digital camera. "I was very surprised by the development of DC technology in the past 30 years, which obviously exceeded my prediction for such products at that time. For 30 years, Kodak has been committed to the development of digital images. I personally witnessed many technological breakthroughs in history and made digital photography achieve today's achievements. " He believes that there are several important technological advances in the development of digital cameras in the past 30 years: Kodak invented CFA (Color Filter Array) in the late 1970s, which made it possible to obtain color images; 1986 Kodak demonstrated the first megapixel color imaging sensor; Since then, JPEG image compression algorithm has been produced, which makes image files easy to store. When it comes to the future of digital imaging, Mr Cezanne does not think that the current technological development has come to an end. According to him, in the next 10 years, people will focus on how to store images. The image files shot by digital cameras are not only data, but also memories, which will become more precious with the passage of time. Kodak will pay more attention to how to save, share, call and organize the technical development of image files in the future. Looking back on the development of photography technology, silver salt technology allows us to obtain excellent images, and digital cameras allow us to quickly obtain and review high-quality images; The representative of the third stage is the latest Kodak Easyshare ONE, which can not only shoot and store quickly, but also share with others quickly through the wireless network. From point to point and sharing, this future is worth looking forward to and needs a lot of hardware and network architecture support. "Cezanne is full of confidence in the future of digital technology. The first digital camera weighed 3.9kg and was powered by 16 AA batteries. The resolution of CCD is 100× 100 pixels, and each pixel has 4 gray levels. The exposure time is 1/20s, and it takes 23s to record an image on a cassette tape. Speaking of his digital camera, Cezanne said that DX7590 is usually used more, and this time he came to China to borrow his wife's LS753, because it is very small. As Kodak introduced time transfer technology ... >>