Chongqing University of Posts and Telecommunications
*Corresponding author.
Email: 3189721556@qq.com
ABSTRACT
The progress of digital media technology is a milestone event in the history of information storage and transmission. Compared with the access of information storage and transmission in the past, the digital media take the digital data as medium. It is worth paying attention to and do researches about the difference of digital media and traditional media, how to fulfil it, the value and characteristic of it. It is the characteristic of digital media that binary data is used as the medium of information storage and transmission, and network transmission is used to store and forward information to realize information interaction.
Through the compiler, we can convert different forms of information including text,
pictures, audio and so on into binary data, or reverse these digital types of data back to the original forms, so as to realize the conversion of traditional information and digital media information. Digital media technology has made great progress since its emergence. From the initial period of using telegraph to transmit information and only sending pointand-line data to the current way of massive data transmission through the network, digital media cutting-edge technologies: VR and AR have matured to be put into the use of civil equipment; VR glasses and other devices allow users to run corresponding functions to provide virtual reality services, and AR technology has been widely used in areas such as navigation enhancement and office interaction enhancement. By searching the literature, observing the changes of data in registers and solid-state drives, using the corresponding functions to realize the input and output of data, sending and receiving methods, analyzing the definition, implementation and development of digital media technology.
Keywords: Digital media, Digitization, Information storage, Information transmission
INTRODUCTION
The emergence of digital media can be traced back totelegraph communication. This period of digital media mainly rely on radio technology to achieve. The technique emerged in the 1830s and was mainly studied in the United States and Britain. Because of the order of magnitude of transmission, telegraphy could only transmit text data, which had to be manually decoded after transmission. Although this mode of transmission is very advanced compared to the traditional mail in that time, the transmission volume is still small and the transmission type is relatively simple.
With the development of Internet technology and computer technology, the progress of digital media technology also ushered in a take-off. Advances in computer technology have made it possible to convert more types of data. Through the compiler, in addition to text, images, audio also has the possibility to store and forward. At the same time, the development of network technology also means that large-scale, high-speed data transmission has become a reality.
With the development of computer and network technology to support the progress of digital media, the advantages of high density, fast transmission and compatibility of various forms of digital media have been realized. Digital media technology is also fully
reflected in the development of human life. In this situation, we should understand how digital media is
realized, how it is used in our life, what kind of significance it has for us and how it will develop in the
future.
DEFINITION OF DIGITAL MEDIA
2.1. The media
Media refers to the medium through which information is transmitted. There are many ways to
transmit information, but no matter what way, they all need to pass through an intermediary carrier, and this carrier, including the information stored and transmitted in it, is the media.
Traditional media generally refers to newspapers, articles and other paper items recorded in the form of
words. With the development of science and technology, broadcasting, Internet and other communication methods have emerged.
2.2. Digital Media
The emergence of digital media means a
revolutionary progress in the way of human information
transmission and storage. Different from traditional
information, digital media makes all kinds of information
into binary data, which greatly increases the density of
data and makes the quantization of information easy to
realize. And make the information copy, transmission
efficiency greatly improved.
The development of digital media in storage,
including data, text, images, audio and other ways to
convert and save, enrich the diversity of information; At
the same time, in the transmission of information, all
connected network, satellite signal equipment, can
achieve data communication, communication channel
interaction. In the case of further development, it can also
realize accurate query and download data, personalized
data sharing becomes a reality, and intelligent data
transmission.
REALIZATION OF DIGITAL MEDIA
3.1. Implementation method of digital media
The emergence of digital media in addition to development is also a challenge, how to successfully
digitize information is the key method. The binary approach requires a methodology mature enough to input and output various types of information in binary form. In order to achieve this purpose, compilation has higher requirements [1].
In order to display these binary data on all devices, a unified compilation, modulation and demodulation
method is needed. If the user uses different data processing procedures, it may lead to data distortion, or even garbled code, which violates the basic principles of information transmission, and the advantages of digital media can not be reflected. This is also the disadvantage of digital media: compared with traditional media, binary data cannot be read directly by human beings, which is
weaker in terms of ease. Without proper conversion, the binary information is useless numbers.
We only need to dig out the meta attributes of each type of data and allocate binary data corresponding to the corresponding attributes. For the definition of metaattribute, we should require it to be able to fully express the information it needs to express, and it is difficult to bedivided into smaller data types. You simply bind thismeta property to binary data. For natural information such as sound and image, we only need to analyze its physical characteristics, and then transform the corresponding physical characteristics. However, for the artificial information type like text, we need to explore by ourselves,summarize the formation methods, and then identify the attributes corresponding to binary data.
3.2. Realization types of digital media
At present, the main types of digital media are text, image and audio. On the basis of these three types, new forms can be formed by combining with each other. For example, video can be formed by playing images in sequence and adding audio.
3.2.1. Digitization of characters
Text is an important way for human to convey information, and this ancient tool cannot be ignored in
digital media. Compared with other types of information, text itself has diversity, and different languages need corresponding conversion methods. If English is used as an example, you only need to allocate the corresponding binary digits for all letters, and then allocate the corresponding binary digits for blank lines and symbols. The alphabet language itself saves a step for digital conversion, and the number of letters plus symbols is small and easy to implement; If you take Chinese as an example, you have a large number of characters, but you also need to allocate binary data for each character. In
short, every language should have meta-attribute properties: English letters, Chinese characters, for
example, just by converting these hard-to-subdivide meta-attribute types into their binary counterparts. A method similar to a telegraph.
3.2.1. Digitization of characters
Text is an important way for human to convey
information, and this ancient tool cannot be ignored in
digital media. Compared with other types of information,
text itself has diversity, and different languages need
corresponding conversion methods. If English is used as
an example, you only need to allocate the corresponding
binary digits for all letters, and then allocate the
corresponding binary digits for blank lines and symbols.
The alphabet language itself saves a step for digital
conversion, and the number of letters plus symbols is
small and easy to implement; If you take Chinese as an
example, you have a large number of characters, but you
also need to allocate binary data for each character. In
short, every language should have meta-attribute
properties: English letters, Chinese characters, for
example, just by converting these hard-to-subdivide
meta-attribute types into their binary counterparts. A
method similar to a telegraph.
For the existence of a variety of different characters,
should be changed to allocate corresponding
transformation mode; However, from the aspect of
hardware, it is impossible to design input and output
devices for each language. For example, it is impossible
to design their own keyboards for input devices such as
keyboards for each language. For Chinese, a language
with a large number of basic characters, it is also
unrealistic to set direct corresponding keys for each metacharacter. In the development of computers, English was
the earliest and most widely used environment, so the
initial development of digital media was naturally based
on English. Under this premise, we can design the second
transformation on the basis of the first transformation,
that is, on the basis of the designed English letters, and
then use English to continue to transform into other
languages. For example, in Chinese, tools such as pinyin
and Wubi are designed to realize this idea. In this way,
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the versatility of input equipment is greatly enhanced,
and users can easily switch between different characters.
3.2.2. Digitization of images
Compared with the traditional image preservation
using optical properties, digital image preservation
conditions are more relaxed, and dissemination is more
convenient. How to binary and save the image is the
primary problem. Digital preservation means that we
need to translate the optical properties of the image itself
into digital properties. The main properties of images are
color, brightness and gray scale. We cut an image into
multiple different regions and record the color of each
region. On this basis, we only need to record the
coordinate information and the color information of the
current coordinate, and then allocate data for each color
and coordinate to achieve the preservation of image data
[2].
3.2.3. Digitization of audio
Sound is essentially a kind of wave. To understand the
nature of this kind of sound, we only need to digitize the
wave data. The preservation characteristics of audio are
mainly loudness, tone and timbre, which are reflected as
frequency, wavelength, wave speed and extreme value in
the form of wave. Therefore, we can assign numeric types
to each of these attributes in turn [3].
- DEVELOPMENT OF DIGITAL MEDIA
Demand is the driving force of development. For the
transmission and dissemination of information, what we
desire is faster transmission speed and higher data
accuracy and accuracy, which requires both the
development of hardware and the improvement and
optimization of software [4].
4.1. Software Optimization
The main realization process of digital media is the
digitization of information input and the visualization of
data output. Software optimization is to optimize the
tasks in this process. Each data should be saved in a more
excellent way. How to save data in a minimum without
losing data? For example, most images have similar color
in large areas. Instead, it is a method to save data in the
form of blocks for data modification to improve accuracy
[5]. At the same time, software optimizations include
ways to read transformed data faster.
4.2. Hardware Optimization
Digital media is a large amount of binary data, but in
the process of input and output data, are reflected in the
way of human perception. Image input and output require
higher pixel density displays and generators, while audio
files require larger sounding parts and more elaborate
frequency modulators. The finer the data, the larger the
data amount. Even if we adopt the optimization method
to reduce the data amount, the basic data principle cannot
be changed. Therefore, a larger amount of data depends
on a higher transmission speed [6]. The development of
digital media needs to be synchronized, and the progress
of a single development needs the cooperation of other
attributes before it can be put into practical use.
4.3. Combination of digital media information
Video is the most intuitive example of digital media
information integration. The form of video is formed by
continuously playing the image by frame, plus the
superposition of audio on the audio track [6]. The
combination of digital media still has various possibilities
to explore and explore.
4.4. Development trend of digital media
AR and VR are two main development trends of
digital media technology.
VR technology makes people feel immersive through
images and 3D technology. Through digital media
technology, VR technology is committed to giving users
a feeling of being fully placed in another real world [7][8].
AR technology implants enhanced information into
the real world we are in in the form of digital media to
enhance our perception and provide information [9].
4.5. Development direction of digital media
Information transmission is ultimately determined by
human perception. At present, the digital media
technology for vision and hearing has a good
development, but the information transfer technology for
touch and even smell is still in its infancy. How to
comprehensively enhance the transmission of all
perceptual information is still the direction of research for
digital media [10]. - CONCLUSION
All technologies are created and developed based on
requirements; The emergence of digital media is because
people have higher requirements and expectations for the
communication and storage of information. Digital media
allows the emergence of new forms of information data,
so that data transmission speed and data density are
greatly improved. The realization principle of digital
media is to digitize data, and rely on computer technology
to realize the transformation process. The digitized data
can be saved through hard disks and other hardware, and
high-speed transmission and accurate transmission can be
realized through network technology. There are infinite
possibilities in the development of digital media. Virtual
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reality and augmented reality technologies are
developing steadily, but there are more possibilities
worth exploring by digital media: the transmission of
taste information and smell information, the development
of digital media for human-computer interaction; Even
digital media should not be limited to the preservation
and transmission of information, we deliberately pursue
creation, explore new human perception, create sensory
perception information that does not belong to the natural
world. Digital media has much more to discover. At the
same time, whether there is still the possibility of
optimization of digital transformation, and how to realize
the digitization of new forms of data, these are still worth
further research.