Rebirth of the Tech Madman

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With the gradual maturity of analog TV technology since the 1950s, people's pursuit of digital video and non-linear editing has never stopped. Please search () to see the most complete! Fastest update

While some powerful manufacturers have successively launched their own digital video preliminary solutions, there has also been a landmark development in the field of non-linear editing.

One of the eye-catching results comes from George Lucas’ Lucas Pictures Co., Ltd. It has a system called Editing Robot, which is similar in size to a 12-inch vinyl record and has a surface similar to that of a music CD. Laser DVD, and database. Together with other means, a certain degree of non-linear editing function is realized.

Established in 1922, the National Association of Broadcasters, held the nab annual meeting in April this year, and hosted the world’s largest or montage image processor. At the same time, it appeared on the stage and attracted a lot of attention.

In fact, these solutions are difficult to commercialize into mature products, because they are all non-universal solutions created by the "indigenous steelmaking" method.

In Tang Huan's view, among these pioneers in the field of digital video and non-linear editing, although traditional manufacturers have technical strength, they have a little less creative spirituality; and users from the front line like George Lucas are. With creative spirituality, they can start research and development spontaneously, but they don't have enough technical strength.

However, having said that, even if they have both technical strength and creative spirit, they may not be able to catch up with Tang Huan, who also has an industry vision and advantages in resource integration.

Regardless of whether it is digital video or non-linear editing, it requires a combination of various achievements to enter the practical stage. In the original time and space, it developed passively and naturally; but now it is urged in advance by Tang Huan with the resources that he has accumulated rapidly over the past few years.

Take the d-vhs camera responsible for the video capture link. The lens and imager part are not much different from other types of cameras, but the recorder part contains technical achievements such as analog-digital converters, digital signal processors, instant lossless compression, video tape formats, and so on.

Due to the uncompressed video information, the bit rate is reached. That is 21.625mb/s. In order to store the data on the 94-minute d-vhs video tape and prepare for the subsequent post-processing, any of these elements are indispensable.

And the -1 system, which provides both digital video and non-linear editing functions, is even more integrated. It is equivalent to an extremely complicated Fangyuan server, and Tang Huan has given it a lot of high-end microcomputer system technology.

For example, the system bus uses the 32-bit version of isa-32, which is the interconnection standard architecture.

The system bus of the Fangyuan computer architecture officially started with the second-generation Fangyuan personal computer, and even collided with the ibm- system bus that was developed at the same time. The latter is called i-structure, also abbreviated as isa.

As part of the business war, the two companies also spat on patents. In the end, because the "interconnect standard architecture" came out earlier, the blue giant angrily gave up the name of the "industrial standard structure", and in the next generation of ibm- It is directly called the xt bus. The current flagship model ibm- is also called at bus.

"Interconnection standard architecture" and "industrial standard structure" are the same except for the bus abbreviation, but also have some similarities in technical specifications. For example, the original version has a width of eight bits and the frequency is the same as the operating frequency of the cpu.

But the difference between the two is quite obvious. The "interconnection standard architecture" supports a certain degree of "plug and play", while the "industrial standard architecture" does not have this feature.

In addition, since the cpu used by ibm- is 4.77mhz intel8088, the frequency of the "industrial standard structure" is also 4.77mhz, and the bus bandwidth is 4.77mhz*8 bits/8=4.77mb/s.

The second-generation Fangyuan personal computer uses the 8mhz intel8088 and the cpu. And 12.5mhz, so the bus bandwidth is at least 8mhz*8 bits/8=8mb/s

This gap cannot be ignored, because the other end of the slot to which the modem, network card, sound card, graphics card and other expansion cards are connected is connected to the system bus. In turn, the performance of network applications, games and other software is significantly improved.

In the era of the three generations of Fangyuan personal computers, the "interconnection standard architecture" and ibm's xt bus and at bus have become more and more distant. Because it has further improved the "plug and play" function, and introduced the 16-bit version of isa -16.

This also means that under the condition that the bus frequency does not change. The data throughput has doubled, which means that the performance of the computer has doubled.

Due to cost constraints, the isa-16 has limited online applications in Fangyuan personal computer products. Its areas of expertise are Fangyuan workstations and Fangyuan servers.

With the advent of the fully 32-bit fourth-generation Fangyuan personal computer, as a part of technical preparation, the isa bus has also evolved to a 32-bit version-isa-32, and first deployed to the Fangyuan server on the high-end product line. And Fangyuan workstation.

There are many changes in isa-32, for example, in addition to the data width of 32 bits, so that the bus throughput is at least double that of isa-16, its operating frequency is no longer synchronized with the faster CPU.

In other words, the "frequency multiplication" mechanism was introduced.

The bus between the cpu and the north bridge equipped with the memory controller is called the front side bus or fsb.

From now on, the operating frequency of isa-32 and cpu is separated by fsb, the speed of cpu is determined by fsb and multiplier, and isa-32 is linked to fsb.

This is the case in the -1 system. The architecture processor it carries has a running frequency of 40mhz and a multiplier of 2. Both fsb and isa-32 buses are 20mhz, so the bus bandwidth has reached 20mhz*32bit/8=80mb/s, laying a solid foundation for digital video processing.

Processor, isa-32 bus, large-capacity memory, digital signal processor dedicated to hardware encoding and decoding, and other chips. It just ensures that the -1 system has strong enough performance to handle huge data streams.

However, there is still another bottleneck that needs to be dealt with. That is, mechanical external storage devices such as hard drives, cd drives, and d-vhs video tapes, which cannot hold back the high-speed electronic devices that are ready.

-1 Hard disk used. It is a 10.5-inch hard drive manufactured by Fujitsu, Japan. Tang Huan took it and added a lot of his own technology to form an enterprise-level storage system with a capacity of 1338mb.

Among them, there are two main technologies, one is a redundant array of redunda disks, and the other is a small computer system interface.

As the name implies, the controller is used to connect multiple hard disks together to provide better protection in terms of capacity, speed, and safety. The 1.338gb hard disk capacity of the -1 system is a good application example.

It's not enough to have a "big belly", and there must be enough data transmission speed. It is used to solve this problem.

It is a system-level interface standard used between computers and hard disks, floppy drives, optical drives, printers, scanners and other peripheral devices. It defines a set of commands and communication protocols, through the ** processor for data transmission, has the advantages of fast and stable, cpu occupancy rate and so on.

In fact, these technologies have long been applied to Fangyuan servers and Fangyuan workstations in the high-end field. Otherwise, why would they challenge ibm's mainframes and minicomputers?

At present, the standard has evolved to the second version of -2. Compared with -1, the indicators are doubled, 16 external devices can be connected at the same time, and the data width is 16 bits. The frequency is 10mhz, which provides a data throughput of 10mhz*16 bits/8=20mb/s.

The isa-32 bus with a bandwidth of 80mb/s also provides enough space for -2 to perform.

On the powerful hardware platform of -1, it runs Vientiane, the most powerful and stable operating system in the Fangyuan computer system. It can seamlessly drive various hard-coded, hard-decoded and other processing chips to provide the best real-time response performance for video processing software.

Of course, a friendly graphical user interface is also indispensable. The directors in the TV station can perform intuitive operations through the mouse based on their professional knowledge and work needs.

Digital video is the basis of non-linear editing. With it, you can directly input timecode or other descriptive metadata. Access to any video frame, instead of having to watch the entire clip to find the desired video frame.

This involves a "random access" mechanism. Memory, hard disks, and optical disks can all achieve "random access", while video tapes are "sequential access".

Fortunately, compared to non-digital storage video tape formats, d-vhs video tapes can also gain speed from descriptive metadata such as time code when performing data retrieval.

Through the use of video processing software, after non-linear editing, the final program is stored on a cheap video tape or a little expensive CD according to the standard 7486 or the pal standard 7576 resolution.

However, the latter has an obvious advantage, that is, the video can be completely "random access" without being restricted to "sequential access".

This mechanism obviously brings great flexibility to the broadcast of TV stations.

During the Los Angeles Olympics, the audience naturally hope to see in time which athletes won the gold medal that day, as well as various wonderful moments. The editing workload of the program can be imagined.

In addition, the western United States, where Los Angeles is located, is about 4 hours away from the eastern United States, the traditional political and economic center.

This inevitably affects how the major American television networks across the country present their programs to the audience in the first time.

Obviously, with the support of the -1 system, CNN has achieved a step faster than all its peers. Everyone stays up late to work overtime to catch up with the show tapes, but CNN has advantages in terms of speed and quality.

Just like after Carl Lewis won four Olympic track and field gold medals, CNN was the first to launch his review from his debut to the present, with the help of special effects provided by video editing software, coupled with majestic music~www .wuxiaspot.com~ That show is a Hollywood blockbuster, which left a deep impression on all viewers.

CNN's TV broadcast quality of the Olympic Games is definitely the best in the world. After other TV organizations were helplessly stealing the limelight, they naturally sent out horses to find the mystery of their success.

Finally, at the end of the Olympic Games, the -1 system, which was evaluated as a fanatical combination of technology and art by the National Federation of Broadcasters, was presented to them.

Seeing the joy of hunting, major TV organizations that don't need money have asked the price, how can they start a set of -1 system?

The answer given by Tang Huan is from 500,000 US dollars. Depending on the configuration, the cost elasticity of the -1 system is still very large.

Seeing the joy of hunting, major TV organizations that don't need money have asked the price, how can they start a set of -1 system?

The answer given by Tang Huan is from 500,000 US dollars. Depending on the configuration, the cost elasticity of the -1 system is still very large (to be continued.)

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