Data compression is a process in which the amount of digital data is condensed or reduced. This reduces the amount of storage space required and reduces the data transfer time. In telecommunications, the compression of messages from a source by a sender is called source encoding. Basically, data compression attempts to remove redundant information. To do this, the data is converted into a … [Read more...]
Archives for November 2023
Basic Details of MP3 Audio Format
MP3 is actually MPEG-1 Audio Layer III or MPEG-2 Audio Layer III. It is a method of lossy compression of digitally stored audio data. MP3 makes use of psychoacoustics with the aim of storing only perceptible parts of the signal for humans. As a result, with barely reduced perceived audio quality, a strong reduction in the amount of data is possible. With an example data rate of 192 kbps, which … [Read more...]
What is FLAC (Free Lossless Audio Codec) Audio Format
Free Lossless Audio Codec (FLAC) is a codec for lossless audio data compression that is being developed by the Xiph.Org Foundation. It is freely available and its use is not restricted by software patents. Development of FLAC began in 2000. In 2004, the band Metallica announced that in the future they would not only sell their concert recordings in the lossy MP3 format, but would offer the … [Read more...]
What is DSD (Direct Stream Digital) Audio Format
DSD (Direct Stream Digital) is a method of digital audio signal storage based on the principle of pulse density modulation (PDM). DSD is also a registered trademark of Sony Corporation. In principle, a DSD data stream can be stored on any digital storage medium of sufficient size. Corresponding files can be obtained from music download portals. Read about various audio file formats. In DSD, … [Read more...]
What is Streaming Media?
Streaming media, commonly referred to as streaming, refers to the simultaneous transmission and playback of video and/or audio data via a computer network via a data stream. The program that is transmitted is referred to as a stream; if the transmitted content takes place in real time, as a live stream. In contrast to downloading, the goal of streaming is not to create a copy of the media for the … [Read more...]
What is Mobile Commerce
Mobile commerce is a special form of electronic commerce using wireless communication and mobile devices. Mobile commerce refers to any type of business transaction in which the transaction partners use mobile electronic communication technologies (such as mobile communications, wireless LAN or Bluetooth) in connection with mobile devices in the context of service initiation, service agreement or … [Read more...]
What is a Triac?
Triac is an abbreviation for triode for alternating current. Terms such as bidirectional thyristor triode or symistor can also be found. It is an electronic component with a semiconductor layer structure, which in principle represents an anti-parallel connection of two thyristors. This makes it possible to switch both half-waves with alternating current, whereas a single thyristor can only switch … [Read more...]
Basic of eCommerce Platforms
Electronic commerce, also known as e-commerce, refers to purchases and sales carried out via the Internet (or other forms of remote data transmission). Early manifestations of e-commerce were found in the online portals of the 1980s, especially in the form of the Electronic Mall at Compuserve. Buyers and sellers conclude sales contracts online; often the business is largely automated. In a … [Read more...]
Basics on Insulator
Non-conductors are substances whose electrical conductivity is comparatively low and therefore usually not relevant and is below that of semiconductors. While the term is used in physics for arbitrary materials such as gases and vacuum, in technology it usually only means solids. Other partially synonymous terms are: Insulator: In addition to the material property described here, the term … [Read more...]
Resistance and Electrical Resistors: Part 2
This article is continuation of part 1 of this series. An important material parameter is the resistivity. The best-known resistor design is the cylindrical ceramic carrier with axial connecting wires. These connecting wires are routed through holes in circuit boards, for example, and soldered to the conductor track connections arranged there (through-hole mounting). A ceramic backing is coated … [Read more...]