Although these practical features do not directly affect the video quality itself, they are of great significance to the viewing experience of the audience and the broadcast process of the radio station.

Take the subtitle function, because of the "digital" content, it is far easier to edit than the "analog" content, and the various languages can be matched in all aspects.

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

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

Now, of course, it is very different, not only the VCD has changed a lot, but even with these practical features, it is also in place in one step.

In Tang Huan's view, these functions can greatly help his Chinese movies, Chinese TV series and other entertainment content at the technical level to get a wider range of audiences.

Of course, it is not only the Chinese language that will benefit, but the most economically powerful English language will definitely come out on top. There is no way to do it, and that's 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 production quality.

The Friendship Games, which he single-handedly promoted, are not the first, but in line with the general situation in the world, it has been confirmed that more than 70 countries and more than 3,000 athletes will compete in 18 major events, and Turner Broadcasting Company expects to produce at least 130 hours of television.

Now that the stage is set up and the big drama is about to begin, the curtain will naturally follow.

Although English is the mainstream in American society, the viewing status of small languages such as Spanish cannot be ignored, especially the ambitious plans of CNN to expand its business to all over the world, which requires friendly support for multiple languages, and Tang Huan's broadcast-grade digital video broadcasting system DigitalVersatileObjects1 - the digital multi-functional object generation system is DVO-1 system, which caters to such needs.

In the building where the equipment was commissioned, Ted Turner looked at the demo samples - "Flower Protection" and "Phantom of the Tomb: Wrath of the Dragon Emperor" with multi-subtitle and multi-channel support, and expressed his first impression, "Your DVO-1 system and the Digital-1 system, a broadcast-grade digital video non-linear editing system, are simply seamless, directly covering the main functional requirements of the TV station." ”

"It's a matter of course." Tang Huan, who was full of ambition, pointed to the TV screen quite smugly and said: "Removing the barrier of language to cultural communication is just an incidental function of my product." More importantly, the era of SD programs will be led into the digital stage by it - the crown of digital SD belongs to me. ”

"It's a pity that your digital SD laurel can only be worn within the scope of the TV station at this stage, and the TV signal is transmitted and finally delivered to the audience, which is still the traditional analog way, which is not so easy to change." Ted Turner quipped.

"I believe that many people will find great business opportunities and take the initiative to help me drive the times." Tang Huan replied confidently.

The so-called standard definition, that is, standard definition - Standard-Definition, refers to the standard with a resolution of 720x576 pixels, and VHS video tapes are equivalent to this specification.

Tang Huan's home version of the VCD is not up to this standard, because its resolution is only a quarter of that of a VHS videotape.

However, his broadcast-grade VCD meets this standard, after all, in this high-end field, the cost factor can be placed in the back row. The DVO-1 system fully supports the output of SD programs, and the resolution supports a 16:9 aspect ratio of 720x480 pixels, a 4:3 aspect ratio of 720x480 pixels, a 4:3 aspect ratio of 640x480 pixels, and a variety of modes, while the picture refresh rate can also be 24 frames per second, 30 frames per second, or 60 frames per second.

Powerful and flexible, it couldn't be more than that.

This also shows from another aspect how alternative Tang Huan's version of VCD is.

Overall,It adds and improves menus、Subtitles、Separation of audio stream and video stream、Digital disc area code restriction and other practical features,Specifically, the product is divided into two directions: home consumer level and radio and television level, one high and one low,The video quality of the former is similar to the old version of the original spaceVCD,The latter is closer to the DVD of the original time and space。

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

The resolution of the home version of the VCD, which corresponds to the NTSC and PAL of the TV standard, is 352x240 pixels and 352x288 pixels, respectively, which is about a quarter of the resolution of the corresponding TV standard.

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

This data concept can be compared with a music CD and a computer CD-ROM/RW to make it more vivid.

The data transmission rate of ordinary music CDs is about 150kB/s, which is defined as 1 times the speed in the computer field, while the speed generally supported by CD-ROM products at this stage is 2 times the speed, and the high-end can reach 8 times the speed.

Based on the speed transfer rate of the home version of the VCD, it is roughly equivalent to that of a regular music CD. That is, a standard 74-minute CD can store about 74 minutes of video in the home version in VCD format.

Factoring in the space taken up by metadata for useful features such as subtitles and menus, a movie usually requires two CDs to store.

In order to play such video programs on a computer, theoretically only a 1x speed disc drive is required, but considering the actual smoothness, at least a 2x speed disc drive is required; If it can reach 8 times the speed, then there will be basically no playback lag due to untimely data transmission.

Obviously, if you add the hardware decoding expansion cards necessary for computer systems, as well as high-spec CPUs, large-capacity memory and other hardware, this will be a bit of a luxury solution, and it still needs market development to reduce the cost to a level that is acceptable to the general public.

As for the manufacturing cost of the home DVD player, it will not be so pessimistic, the high cost of the computer system is largely due to the strict requirements of the computer system for data accuracy, compared with the music CD without error correction function, the computer CD-ROM product has a "three-layer error correction" mechanism to ensure the accuracy of the data requirements, but also increasing the cost; Moreover, the CPU used by the computer is a general-purpose microprocessor, which not only does not achieve the highest efficiency for video applications, but also wastes performance and cost. In contrast, home DVD players can kill multiple birds with one stone by directly adopting the overall scheme of a special decoding chip.

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

At present, the price of home VHS video recorders on the market is about a few hundred dollars, and the newly baked home VCD player; The initial price is in the few thousand dollars; As for the broadcast-grade DVO-1 system, the cheapest price is hundreds of thousands of dollars.

The difference is so great, not only due to market positioning, but also because it is close to the original time and space DVD technology of radio and television VCD, itself is expensive, its speed transmission rate is several times that of home consumption, DVO-1 system internal data transmission cable, even use the latest fiber technology.

At the same time, the storage media and drivers of broadcast and television VCDs do not directly adopt the low-cost solution of off-the-shelf CDs, but redesign a new set of solutions: DigitalVersatileObjects - Digital Multifunctional Objects or DVOs, a solution between VCD and DVD in the original time and space, which 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 proved that he has the strength to kick them out of another set, the reason why the storage media and drive system of the home consumer VCD, using the CD solution, is just because it has been proven that the market is willing to accept, and then try to save trouble!

The most obvious difference between the two storage media and the drive system is also in terms of data throughput.

Music CDs and computer CD-ROM, CD-R, CD-RW, and home consumer VCDs are all based on music CD storage and drive solutions, so their basic unit of data transfer rate is based on music CDs, that is, about 150 kilobytes per second, and home consumer VCDs have a data transfer rate of more than 1300 kilobits per second, which is also to cater to this limitation.

DVO also has a data transfer speed concept like a CD, but it doubles the speed of 600 kilobytes per second.

On a deeper level, this distinction stems from the MovingPictureExpertsGroup, a non-visible multimedia compression standard, known as MPEG.

In this set of multimedia compression standards, there are two main areas - video and audio, which are divided into four levels, namely Layer 1, Layer 2, Layer 3 and Layer 4.

Layer 1 is lossless compression, the main purpose is to facilitate data organization, and it has little significance for actual multimedia playback, at least at this stage.

VedioLayer 1 for video is similar to Huffyuv, and AudioLayer 1 for audio is equivalent to FLAC in the 21st century.

Since Layer 2, the compression standard is lossless compression.

VedioLayer 2 for video and AudioLayer 2 for audio are both targeted at broadcast and television grades, which is the compression standard used in expensive DVO-1 systems.

VedioLayer 3 for video is the video compression standard used for consumer VCDs, but due to the current resource overhead for decoding, the audio compression standard uses AudioLayer 2.

As for the AudioLayer3 that has been put on hold for the time being, it is basically the famous MP3 in the original time and space.

VedioLayer 4 for video and AudioLayer 4 for audio, both of which are targeted at web-based streaming, can only be used in special occasions such as laboratories for the time being.

Around such a complete and complex set of multimedia compression standards, thousands of patents have been generated, and they are also the cornerstone of Tang Huan's preparation for future multimedia applications.

Of course, the current situation is as Ted Turner just analyzed, the influence of the DVO-1 system at the technical level can only be limited to the scope of the TV station, the transmission of the TV program signal, and the program receiving terminal on the audience side - the TV set, will also be maintained in the "analog" mode, which is caused by the precipitation of decades of industry development, it is impossible to switch to the "digital" mode in one step, but whether its application will not enter the actual stage until the "HD" is still in the research stage after the launch, It depends on Tang Huan's ability to put his creation into action.

If "SD" and "digital" were to marry now, the most immediate benefit would be that the valuable program transmission channel would be able to transmit multiple digital signals at the same time more efficiently than analog signal modulation.

At the same time, although the digital SD TV system has the same effect as the general NTSC, PAL, SECAM standard analog TV, it can effectively reduce the occurrence of ghosts, snowflake videos and noise.

is still the same sentence, the roadmap has been fiddled with by Tang Huan very clearly, I believe that some people will see the huge business opportunities contained in it, and take the initiative to come over to promote it and seize the market opportunity.

As for the home DVD player, because the price remains high for the time being, and the viewing quality of the program is roughly the same as that of VHS video recorders, the temporary market cold reception is to be expected.

However, depending on the acceptance of his Chinese films and TV series around the world, Tang Huan will accelerate the price decline of home DVD players at any time, so that its multi-subtitle and multi-dubbing functions can help, and even simply let high-end DVOs replace them.

In short, Tang Huan's entertainment media industry is slowly getting closer to the IT industry, so that unimaginable chemical cooperation will occur, allowing him to continue to win the future.

? (To be continued.) )