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DVB-SH
DVB-SH
DVB-SH
("DIGITAL VIDEO BROADCASTING - SATELLITE SERVICES TO HANDHELDS") is a physical layer standard for delivering IP based media content and data to handheld terminals such as mobile phones or PDAs, based on a hybrid satellite/terrestrial downlink and for example a GPRS
GPRS
uplink. The DVB Project published the DVB-SH
DVB-SH
standard in February 2007. The DVB-SH
DVB-SH
system was designed for frequencies below 3 GHz, supporting UHF band, L Band or S-band. It complements and improves the existing DVB-H
DVB-H
physical layer standard. Like its sister specification (DVB-H), it is based on DVB IP Datacast (IPDC) delivery, electronic service guides and service purchase and protection standards
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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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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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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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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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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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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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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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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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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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NXP Semiconductors
NXP SEMICONDUCTORS N.V. is a Dutch global semiconductor manufacturer headquartered in Eindhoven
Eindhoven
, Netherlands
Netherlands
. The company employs approximately 45,000 people in more than 35 countries, including 11,200 engineers in 23 countries. NXP reported revenue of $6.1 billion in 2015, including one month of revenue contribution from recently merged Freescale Semiconductor
Freescale Semiconductor
. On October 27, 2016, it was announced that Qualcomm
Qualcomm
would buy NXP. CONTENTS * 1 Description * 2 Philips
Philips
Semiconductors
Semiconductors
* 3 Launch of NXP Semiconductors
Semiconductors
N.V
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Agence De L'innovation Industrielle
The AGENCE DE L\'INNOVATION INDUSTRIELLE was a French governmental agency created in 2005 to support technological projects. As of 2006, it was supporting seven projects: * BioHub , a chemistry projects to create products with cereals, without using oil * HOMES , a project of housing with ultra-low use of energy * Nanosmart, a project of substrate * Quaero , a search engine * TVMSL , a project of creating a standard of hybrid terrestrial and satellite mobile television based on DVB-H
DVB-H
* NeoVal , a small automated subway system to replace the VAL * VHD (Hybrid Diesel Vehicle ), which involves PSA Peugeot Citroën .The agency was headed by Jean-Louis Beffa and Robert Havas
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TVMSL
TVMSL (TéléVision Mobile Sans Limite) is a project led by Alcatel that plans to develop a DVB-H standard suitable for hybrid satellite and terrestrial transmission. Other partners involved in TVMSL are Sagem , Alenia , RFS , Philips , DiBcom , TeamCast , UDcast , CNRS , INRIA , CEA-LETI . It is supported by the newly created French Agence de l\'innovation industrielle (AII). KEY FIGURES * Total cost of the project: 98 million euros. * Allocation from AII: 38 million euros. * Leader : Alcatel. This article related to telecommunications is a stub . You can help by expanding it
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64QAM
QUADRATURE AMPLITUDE MODULATION (QAM) is both an analog and a digital modulation scheme. It conveys two analog message signals, or two digital bit streams , by changing (modulating) the amplitudes of two carrier waves , using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves of the same frequency, usually sinusoids , are out of phase with each other by 90° and are thus called quadrature carriers or quadrature components — hence the name of the scheme. The modulated waves are summed, and the final waveform is a combination of both phase-shift keying (PSK) and amplitude-shift keying (ASK), or, in the analog case, of phase modulation (PM) and amplitude modulation. In the digital QAM case, a finite number of at least two phases and at least two amplitudes are used
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Time-division Multiplexing
TIME-DIVISION MULTIPLEXING (TDM) is a method of transmitting and receiving independent signals over a common signal path by means of synchronized switches at each end of the transmission line so that each signal appears on the line only a fraction of time in an alternating pattern. It is used when the data rate of the transmission medium exceeds that of signal to be transmitted. This form of signal multiplexing was developed in telecommunications for telegraphy systems in the late 19th century, but found its most common application in digital telephony in the second half of the 20th century
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