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S-DMB
S-DMB (SATELLITE-DMB) is a hybrid version of the Digital Multimedia Broadcasting
Broadcasting
. The S-DMB uses the S band (2170-2200 MHz) of IMT-2000. and delivers around 18 channels at 128 kbit/s in 15 MHz. It incorporates a high power geostationary satellite , the MBSat 1 . For outdoor and light indoor coverage is integrated with a terrestrial repeater (low power gap-filler) network for indoor coverage in urban areas. A similar architecture is also used in XM Satellite Radio
XM Satellite Radio
, Sirius Satellite Radio
Radio
, DVB-SH
DVB-SH
and ETSI Satellite Digital Radio (SDR)
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Audio Video Standard
AUDIO VIDEO STANDARD (AVS) is a family of compression standards for digital audio and digital video , competing with AAC audio, and H.264/AVC and HEVC video. Chinese companies own 90% of AVS patents, and require small royalties. The audio and video files typically have an .avs extension. Outside China, it has not seen any commercial use; the Xiph and WebM formats fill a similar niche outside China. All Chinese television broadcasts are in AVS+ since 2014. CONTENTS * 1 Overview * 2 AVS+ * 3 AVS2 * 4 Third-party * 5 References * 6 External links OVERVIEWDevelopment of AVS began in 2002 by the People's Republic of China government, shortly after the ITU H.264 and MPEG AVC working groups merged. Success of the AVS standard would not only reduce China's royalty/licensing payments to foreign companies, it would give China's electronics industry recognition among established Western and Japanese corporations
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VC-1
SMPTE 421M, informally known as VC-1, is a video coding format . It was initially developed as the proprietary video format Windows Media Video 9 by Microsoft
Microsoft
in 2003 and officially approved as a SMPTE video codec standard on April 3, 2006. It is today a supported standard found in Blu-ray
Blu-ray
Discs , Microsoft's Silverlight framework, and the now-discontinued HD DVD
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H.264/MPEG-4 AVC
H.264 or MPEG-4 PART 10, ADVANCED VIDEO CODING ( MPEG-4 AVC) is a block-oriented motion-compensation -based video compression standard . As of 2014 it is one of the most commonly used formats for the recording, compression, and distribution of video content. The intent of the H.264/AVC project was to create a standard capable of providing good video quality at substantially lower bit rates than previous standards (i.e., half or less the bit rate of MPEG-2
MPEG-2
, H.263 , or MPEG-4 Part 2 ), without increasing the complexity of design so much that it would be impractical or excessively expensive to implement
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H.262/MPEG-2 Part 2
H.262 or MPEG-2
MPEG-2
PART 2 (formally known as ITU-T Recommendation H.262 and ISO/IEC 13818-2, also known as MPEG-2
MPEG-2
VIDEO) is a video coding format developed and maintained jointly by ITU-T Video Coding Experts Group (VCEG) and ISO /IEC Moving Picture Experts Group (MPEG). It is the second part of the ISO/IEC MPEG-2
MPEG-2
standard. The ITU-T Recommendation H.262 and ISO/IEC 13818-2 documents are identical. The standard is available for a fee from the ITU-T and ISO. MPEG-2
MPEG-2
Video is similar to MPEG-1 , but also provides support for interlaced video (an encoding technique used in analog NTSC, PAL and SECAM television systems). MPEG-2
MPEG-2
video is not optimized for low bit-rates (less than 1 Mbit/s), but outperforms MPEG-1 at 3 Mbit/s and above
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Mobile Device
A MOBILE DEVICE, (or HANDHELD COMPUTER), is a computing device small enough to hold and operate in the hand. Typically, the device has a either flatscreen display with a small numeric keypad or alphanumeric keyboard , or a touchscreen providing a virtual keyboard and buttons (icons ) on-screen. Many such devices can connect to the Internet
Internet
and interconnect with other devices such as car entertainment systems or headsets via Wi-Fi
Wi-Fi
, Bluetooth
Bluetooth
or near field communication (NFC). Integrated cameras, digital media players , mobile phone and Global Positioning System (GPS) capabilities are common. Power is typically provided by a lithium battery . Mobile devices may run mobile operating systems that allow third-party apps specialized for said capabilities to be installed and run. Early pocket-sized mobile phones were joined in the late 2000s by larger but otherwise similar tablets
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Video Codec
A VIDEO CODEC is an electronic circuit or software that compresses or decompresses digital video . It converts raw (uncompressed) digital video to a compressed format or vice versa. In the context of video compression, "codec " is a concatenation of "encoder" and "decoder"—a device that only compresses is typically called an encoder, and one that only decompresses is a decoder. The compressed data format usually conforms to a standard video compression specification . The compression is typically lossy , meaning that the compressed video lacks some information present in the original video. A consequence of this is that decompressed video has lower quality than the original, uncompressed video because there is insufficient information to accurately reconstruct the original video
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MP3
MP3
MP3
(formally MPEG-1
MPEG-1
AUDIO LAYER III or MPEG-2
MPEG-2
AUDIO LAYER III) is an audio coding format for digital audio . Originally defined as the third audio format of the MPEG-1
MPEG-1
standard, it was retained and further extended—defining additional bit rates and support for more audio channels —as the third audio format of the subsequent MPEG-2 standard. A third version, known as MPEG
MPEG
2.5—extended to better support lower bit rates—is commonly implemented, but is not a recognized standard. MP3
MP3
(or MP3) as a file format commonly designates files containing an elementary stream of MPEG-1
MPEG-1
audio and video encoded data, without other complexities of the MP3
MP3
standard
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Dolby Digital
DOLBY DIGITAL is the name for audio compression technologies developed by Dolby Laboratories
Dolby Laboratories
. It was originally named DOLBY STEREO DIGITAL until 1994 . Except for Dolby TrueHD, the audio compression is lossy . The first use of Dolby Digital
Dolby Digital
was to provide digital sound in cinemas from 35mm film prints. It is now also used for other applications such as TV broadcast, radio broadcast via satellite, DVDs , Blu-ray
Blu-ray
Discs and game consoles
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Geostationary Satellite
A GEOSTATIONARY ORBIT, GEOSTATIONARY EARTH ORBIT or GEOSYNCHRONOUS EQUATORIAL ORBIT (GEO) is a circular orbit 35,786 kilometres (22,236 mi) above the Earth's equator and following the direction of the Earth's rotation. An object in such an orbit has an orbital period equal to the Earth's rotational period (one sidereal day ) and thus appears motionless, at a fixed position in the sky, to ground observers. Communications satellites and weather satellites are often placed in geostationary orbits, so that the satellite antennas (located on Earth
Earth
) that communicate with them do not have to rotate to track them, but can be pointed permanently at the position in the sky where the satellites are located
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South Korea
Coordinates : 36°N 128°E / 36°N 128°E / 36; 128 Republic
Republic
of Korea 대한민국 DAEHAN MINGUK Flag Emblem MOTTO: "홍익인간 (弘益人間) " (Korean ) (de facto ) "Benefit broadly in the human world/Devotion to the Welfare of Humanity" ANTHEM: Aegukga "애국가 (愛國歌)" (Korean ) (de facto ) "Patriotic Song" GOVERNMENT EMBLEM 대한민국정부 상징문양 (Korean) Government Emblem of South Korea
Korea
Area controlled by South Korea
Korea
is shown in dark green; South Korean-claimed but uncontrolled regions shown in light green
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Super High Frequency
SUPER HIGH FREQUENCY (SHF) is the ITU designation for radio frequencies (RF) in the range between 3 and 30 gigahertz (GHz). This band of frequencies is also known as the CENTIMETRE BAND or CENTIMETRE WAVE as the wavelengths range from one to ten centimetres. These frequencies fall within the microwave band, so radio waves with these frequencies are called microwaves. The small wavelength of microwaves allows them to be directed in narrow beams by aperture antennas such as parabolic dishes , so they are used for point-to-point communication and data links and for radar . This frequency range is used for most radar transmitters, wireless LANs , satellite communication , microwave radio relay links, and numerous short range terrestrial data links. Wireless USB
Wireless USB
technology is anticipated to use approximately one-third of this spectrum
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Radio Frequency
RADIO FREQUENCY (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around 7004200000000000000♠20 kHz to 7011300000000000000♠300 GHz , roughly the frequencies used in radio communication . The term does not have an official definition, and different sources specify slightly different upper and lower bounds for the frequency range. RF usually refers to electrical rather than mechanical oscillations. However, mechanical RF systems do exist (see mechanical filter and RF MEMS ). Although radio frequency is a rate of oscillation, the term "radio frequency" or its abbreviation "RF" are used as a synonym for radio – i.e., to describe the use of wireless communication, as opposed to communication via electric wires
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Dolby Digital Plus
DOLBY DIGITAL PLUS, also known as ENHANCED AC-3 (and commonly abbreviated as DD+ or E-AC-3, or EC-3) is a digital audio compression scheme developed by Dolby Labs
Dolby Labs
for transport and storage of multi-channel digital audio. It is a successor to Dolby Digital (AC-3), also developed by Dolby, and has a number of improvements including support for a wider range of data rates (32 Kbit/s to 6144 Kbit/s), increased channel count and multi-program support (via substreams), and additional tools (algorithms) for representing compressed data and counteracting artifacts. While Dolby Digital (AC-3) supports up to 5 full-bandwidth audio channels at a maximum bitrate of 640 Kbit/s, E-AC-3 supports up to 15 full-bandwidth audio channels at a maximum bitrate of 6.144 Mbit/s
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Brazil
Coordinates : 10°S 52°W / 10°S 52°W / -10; -52 Federative Republic
Republic
of Brazil República Federativa do Brasil (Portuguese ) Flag Coat of arms MOTTO: * Ordem e Progresso (Portuguese) * (English: "Order and Progress") ANTHEM: * "Hino Nacional Brasileiro " * (English: "Brazilian National Anthem")* ------------------------- * FLAG ANTHEM: * Hino à Bandeira Nacional * (English: "National Flag Anthem")* NATIONAL SEAL * Selo Nacional do Brasil * National
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High Efficiency Video Coding
HIGH EFFICIENCY VIDEO CODING (HEVC), also known as H.265 and MPEG-H PART 2, is a video compression standard , one of several potential successors to the widely used AVC (H.264 or MPEG-4 Part 10). In comparison to AVC, HEVC offers about double the data compression ratio at the same level of video quality, or substantially improved video quality at the same bit rate . It supports resolutions up to 8192×4320, including 8K UHD . In most ways, HEVC is an extension of the concepts in H.264/MPEG-4 AVC. Both work by comparing different parts of a frame of video to find areas that are redundant, both within a single frame as well as subsequent frames. These redundant areas are then replaced with a short description instead of the original pixels
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