Rebirth of the Tech Madman

Although these practical features do not directly affect the quality of the video itself, they are of great significance to the viewing experience of the viewer and the broadcasting process of the radio station. ＊W.suimeng.lā

Take the subtitle function as an example. Due to the relationship of "digital" content, editing is far more convenient than "analog" content, and various languages ​​can be matched.

The separation of audio stream and video stream can further assist the expression of video content in terms of dubbing.

To sum it up, it is actually the multi-subtitle and multi-channel support of video content that has been popularized in the original time and space for many years. The reason why it has not been able to emerge with VCD until the Internet and HD era was perfected, to a large extent The design itself is not in place.

Now of course it is very different. Not only has VCD changed drastically, it has also achieved these practical features in one step.

In Tang Huan's view, these functions can greatly help his Chinese-language movies, Chinese-language TV series and other entertainment content to reach a wider audience at the technical level.

Of course, the Chinese are not the only ones who will benefit, and English, which is the most economically powerful, is definitely the best. There is no alternative to this, and this is the general trend.

Ted Turner’s focus is similar to that of Tang Huan, after all, there is a project in front of him that requires extremely high programming quality.

The friendly games he promoted is the first, but it conforms to the general situation of the world. It has been confirmed that there will be more than 70 countries and more than 3,000 athletes participating in 18 major events, and Turner Broadcasting The company expects to produce at least 130 hours of TV shows.

Now that the stage is set up and the show is about to begin, the news will naturally follow.

Although English is the mainstream in American society, the viewing status of small languages ​​such as Spanish cannot be ignored. In particular, CNN’s ambitious plan to expand its business to all parts of the world requires friendly support for multiple languages. The broadcast and television-level digital video broadcast system DigitalVersatileObjects1 introduced by Tang Huan—digital multifunctional object generation system, namely DVO-1 system, caters to this demand.

In the building where the equipment was debugged, Ted Turner looked at the demo demos-"Hua Hua Qing Qing" and "The Phantom of the Tomb: The Wrath of the Dragon Emperor" with support for multi-subtitles and multi-channel, and gave his first impression. Your DVO-1 system, and that broadcast and TV-level digital video non-linear editing system—Digital-1 system, are seamlessly connected, directly covering the most important functional requirements of the TV station."

"This is a natural product feature coverage." The smug Tang Huan pointed to the TV screen with complacency and said: "Removing language barriers to cultural communication is just a side function of my product. It is even more critical. The thing is, the era of SD programs will be led by it into the digital stage-the laurel of digital SD belongs to me."

"Unfortunately, your digital SD laurels can only be worn within the scope of the TV station at this stage. The TV signal is transmitted out and finally reaches the audience. It is still the traditional analog method, which is not so easy to change." Ted Tou Na was joking.

"I believe that many people will discover huge business opportunities from it, and then take the initiative to help me promote the changes of the times." Tang Huan replied confidently.

The so-called standard definition, that is, standard definition—Standard-, refers to the standard that the definition reaches 720x576 pixels, and VHS video tapes are equivalent to this specification.

Tang Huan's home-use VCD does not meet this standard because its resolution is only a quarter of that of VHS video tapes.

However, his broadcast and television-grade VCD meets this standard. After all, in this high-end field, the cost factor can go backwards. The DVO-1 system fully supports the output of standard-definition programs, and the resolution supports multiple modes such as 720x480 pixels of 16:9 aspect ratio, 720x480 pixels of 4:3 aspect ratio, 640x480 pixels of 4:3 aspect ratio, and the screen at the same time The refresh rate can also be 24, 30, or 60 frames per second.

There is nothing more powerful and flexible than this.

This also shows how different Tang Huan's VCD is from another aspect.

In general, it has added and improved practical features such as menus, subtitles, separation of audio and video streams, and digital video disc zone code restrictions. Specifically, the products are divided into two directions: household consumption level and broadcast TV level, one high and one low. The former The video quality is similar to the original VCD of the original space-time version, which is closer to the original space-time DVD.

Obviously, with the difference in video quality support, there is an extremely obvious difference in data throughput between home DVD players and DVO-1 systems.

The resolution of the home version of the VCD, corresponding to the NTSC and PAL of the TV system, is 352x240 pixels and 352x288 pixels, which is about one-fourth of the resolution of the corresponding TV system.

Its data transfer rate is 1150kbit/s for video and 224kbit/s for audio, totaling 1374kbit/s.

This data concept can be compared more vividly with music CD and computer CD-ROM/RW.

The data transfer rate of ordinary music CD is about 150kB/s. This indicator is defined as 1x speed in the computer field. At this stage, CD-ROM products generally support 2x speed, and high-end products can reach 8x speed.

Calculated according to the speed transfer rate of the home version VCD, it is roughly equivalent to the ordinary music CD. In other words, a standard 74-minute CD can store approximately 74 minutes of home-use video in VCD format.

Taking into account the space occupied by the metadata of practical features such as subtitles and menus, a movie usually needs two CDs to store.

In order to play such video programs on a computer, theoretically only a 1x speed optical disc drive is needed, but considering the actual smoothness, at least a 2x speed or higher optical disc drive; if it can reach 8x speed, it will basically not be because The data transmission is not timely and the playback is stuck.

Obviously, if you add the hardware decoding expansion card necessary for the computer system, and the high-specification CPU, large-capacity memory and other hardware, this will be a somewhat luxurious solution, and market development is still needed to reduce the cost to the general public. Acceptable level.

As for the manufacturing cost of home DVD players, it is not so pessimistic. The high cost of computer systems is largely due to the strict requirements of computer systems for data accuracy. Compared with music CDs without error correction functions, computer CD- There is a "three-layer error correction" mechanism in ROM products to ensure the accuracy of this data, and at the same time increase the cost; and the CPU used by the computer is a general-purpose microprocessor, which can not achieve the highest efficiency for video applications. Performance and cost waste. In contrast, home DVD players can achieve multiple goals by directly adopting a dedicated decoder chip overall solution.

The gap between household consumer-grade VCD and broadcast TV-grade VCD can also be vividly described by a comparison.

At present, home VHS video recorders on the market sell for a few hundred dollars, while the freshly released home VCD players are initially priced at several thousand dollars. As for the broadcast and TV-grade DVO-1 system, the cheapest price is also dozens of dollars. Ten thousand U.S. dollars.

Such a huge difference is not only caused by market positioning, but also because of the broadcast and TV-grade VCD that is close to the original DVD technology in time and space. It is inherently expensive and its speed transmission rate is several times that of household consumption. DVO-1 The cables used for data transmission within the system even use the latest optical fiber technology.

At the same time, the storage media and drives of broadcast and television-grade VCDs did not directly adopt the low-cost solution of ready-made CDs. Instead, they redesigned a set of solutions: DigitalVersatileObjects—Digital VersatileObjects—that is, DVO. A solution between VCD and DVD in the original time and space, it can smoothly replace the existing CD, CD-ROM, CD-R, CD-RW, VCD in the future.

This is also a point that Philips and Sony are very afraid of. Tang Huan used facts to prove that he has the ability to kick them off to create another set. The reason why the storage medium and drive system of household consumer-grade VCD adopts the CD solution is only because of its It has been proved that the market is willing to accept it, and it will save trouble!

The most obvious difference between these two storage media and drive systems is also reflected in data throughput.

Music CDs, computer CD-ROMs, CD-Rs, CD-RWs, and household consumer-grade VCDs are all based on music CD storage and drive solutions, so their basic data transfer rate units are based on music CDs, which is approximately The data transfer rate of 150 kilobytes per second and household consumer-grade VCDs of more than 1,300 kilobits per second is also to cater to this limitation.

DVO also has the concept of data transmission speed similar to CD, but its double speed reaches 600 kilobytes per second.

From a deeper level, this difference stems from the invisible and intangible multimedia compression standard MovingPictureExpertsGroup—Moving Picture Experts Group, or MPEG.

In this set of multimedia compression standards, it is mainly divided into two areas-video and audio, which are divided into 4 levels respectively, namely Layer1, Layer2, Layer3 and Layer4.

Layer1 is a lossless compression. The main purpose is to facilitate data sorting. It has little meaning for actual multimedia playback, at least at this stage.

The video is similar to Huffyuv, and the audio is equivalent to the FLAC that appeared in the 21st century in the original time and space.

Starting from Layer 2, the compression standard is a lossless compression.

Both video and audio applications are aimed at broadcasting and TV, which is also the compression standard used by the expensive DVO-1 system.

The video is the video compression standard adopted by the household consumer-level VCD, but due to the current resource overhead required for decoding, the audio compression standard is adopted.

As for the temporarily shelved, it is basically the famous MP3 in the original time and space.

Both video and audio applications are aimed at network-based streaming media, and they can only appear on special occasions such as laboratories for the time being.

Around such a complete and complex multimedia compression standard, thousands of patents have been produced, and they are also the cornerstone of Tang Huan, who is behind the scenes, preparing for future multimedia applications.

Of course, the current situation is just like the analysis by Ted Turner, the technical influence of the DVO-1 system can only be limited to the scope of the TV station, the spread of TV program signals, and the program receiving terminal on the viewer’s side. -Televisions will remain in the "analog" mode. This is due to the accumulation of decades of industry development. It is impossible to switch to the "digital" mode in one step, but whether its application has to wait until it is still in the research stage Tang Huan's ability to put creativity into action before entering the actual stage after the launch of the "HD".

If "standard definition" and "digital" begin to marry now, the most direct benefit of UU Kanshu www.uukahnshu.com is that compared to analog signal modulation, the precious program transmission channel will be able to transmit multiple numbers more efficiently at the same time. signal.

At the same time, although the digital standard-definition TV system has the same effect as the normal NTSC, PAL, and SECAM standard analog TV, it can effectively reduce the occurrence of ghosts, snowflakes, and noise.

Again, the road map has been made very clear by Tang Huan. I believe that someone will see the huge business opportunities in it, and take the initiative to push forward and seize market opportunities.

As for the home DVD player, because the temporary price remains high, and the program viewing quality is roughly equivalent to that of VHS video recorders, a temporary cold reception in the market can be expected.

However, Tang Huan will, depending on the acceptance of his Chinese-language movies and TV series, accelerate the price decline of home DVD players at any time, so that its multi-subtitle and multi-dubbing function can help out, and even let the high-end DVO replace it.

In short, Tang Huan’s entertainment and media industry is slowly approaching the IT industry, which has resulted in unimaginable synergy, allowing him to continue to win the future.

? (To be continued.)