小喵呜777
mp3:MPEG-1 Audio Layer 3, more commonly referred to as MP3, is a popular digital audio encoding and lossy compression format, designed to greatly reduce the amount of data required to represent audio, yet still sound like a faithful reproduction of the original uncompressed audio to most listeners. It was invented by a team of German engineers who worked in the framework of the EUREKA 147 DAB digital radio research program, and it became an ISO/IEC standard in 1991.电子词典:A dictionary is a list of words with their definitions, a list of characters with their glyphs, or a list of words with corresponding words in other languages. In a few languages, words can appear in many different forms, but only the lemma form appears as the main word or headword in most dictionaries. Many dictionaries also provide pronunciation information; grammatical information; word derivations, histories, or etymologies; illustrations; usage guidance; and examples in phrases or sentences. Dictionaries are most commonly found in the form of a book. Some dictionaries are also found in electronic portable handheld devices. Most dictionaries are produced by lexicographers
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What is MP3 MP3 full name is Moving Picture Experts Group , Audio Layer III one , technology used by it is third generation developing out on compression technology in VCD (MPEG-1) VF , but not MPEG-3. MP3 is one kind of the international technical norms that VF compresses , start from 1980 age medium term (1987), before Germany Erlangen Fraunhofer research institute begin code studying the sound concentrating efforts on height mass , low data rates. Be in DietUnder Seitzer help of Germany professor of university, 1989, Fraunhofer patent being obtained permission to have got MP3 in Germany, the quilt submits almost annual last this technology to International Standards Organization (ISO) , integrates to have entered the MPEG-1 standard. The MPEG sound standard provides independent three compression arrangement of ideas: 1 tier of (1, tier of Layer) 2 (Layer 2) composes in reply 3 tier of (Layer 3), the consumer may be on the march between complexity and sound quality judging to the arrangement of ideas choice. (1) 1's tier of coders are Complicated 2's tier of coders degree is medium (2) , the coder data-out rates are 256 kb/s ~ 192 kb/s, the person applies including that the figure broadcasts sound (digital broadcast audio , DBA) , figure music , CD-I (compact disc-interactive) and VCD (video compact disc) etc.3's tier of coders are most complicated (3) , the coder data-out leads being 64 kb/s, apply to upper voice transmission of ISDN mainly.Mpeg-1 lay 3 support sampling rate are 32 , 44.1 , 48 khz , lead bit supporting 32- - - 320 kbps Mpeg-2 lay 3 support sampling rate to be 16 , 22.05 , 24 khz , lead bit supporting 8- - - 160 kbps Fraunhofer to be unable to be in progress extended to here, with it truns out that again, sampling rate supported by MPEG-2 gets rid of with 2 : 8 , 11.025, and 12 kHz, bit of rates and MPEG-2 are identical , are called \" MPEG 2.5 ". M
老马4568
The Nokia 6120 classic is a Nokia-produced Symbian OS smartphone (not to be confused with Nokia 6120, an obsolete mobile phone by Nokia). It is the first Nokia UMTS / HSDPA dual band mobile which also features quad band GSM.Interface ChangesThe 6120 classic user interface lacks the typical 3D animated menu items as well as some (thought to be Nokia standard) software applications, such as for example the Stopwatch, however since it operates under Symbian, third party programs can be installed to regain those applications.[edit] Nokia 6121 ClassicNokia 6121 classic is the first UMTS900 device on the market. It is available in five colours: Black, Blue, White, Gold and Pink. The 6120 classic and 6121 classic are identical, the only difference is that they have a different set of 3G frequencies.[edit] Nokia 6124 ClassicThe Nokia 6124 is a Vodafone variant of the Nokia 6120 Classic.[edit] NM705iThe NM705i is the NTT DoCoMo version of the 6120 classic. The phone lacks the ability to install native applications, and also lacks HSDPA and an email client. NM705i has i-mode software (i-mode browser, i-mode mail, i-appli) instead of MIDP applications, MMS, and the Nokia web browser.[edit] FeaturesThe 6120 classic has UMTS 850/2100 MHz with HSDPA while the American 6121 classic has UMTS 900/2100 MHz with HSDPA. Both models support quad band GSM. The NM705i has FOMA 800/850 MHz, 2 GHz connectivity.All models feature a secondary front mounted camera for video phone calls. The resolution of the camera is only 320x240, since the video calls are only shown on other handsets screens. The front camera can also be used to take self portraits. The Regular camera is a 2 megapixel camera with 4x digital zoom, but no autofocus.Nokia has begun to move away from the traditional proprietary Pop-Port. The phone features a standard Mini USB connector which does not charge the battery. When a USB cable is connected, the phone asks what type of connection it should make, with the choice of media player, PC-suite or Data transfer. The data transfer mode allows the phone to function as a mass storage device making a card reader (to access the phone's microSD card) unnecessary.The base of the phone also features a 4-part 2.5 mm socket for the supplied headset. When the supplied 4-part 2.5 mm headset is plugged in, it can function as an antennae for the stereo FM radio that also has support for Visual Radio.It is possible to connect a 3-part 2.5 mm to 3.5 mm adapter to use with standard headphones, however as normal headphones do not have a microphone, this feature may be best suited for media viewing/listening only. The audio player supports MP3, M4A, eAAC+ and WMA formats. iTunes protected audio is not compatible, however iTunes Plus music can be played on the phone.The phone is capable of Video recording-QVGA with the resolution of 320x240 @15fps the front camera can also be used but only with a resolution of 176x144.For video playback the phone has H.264/MPEG-4 AVC , H.263, RealVideo 7,8,9,10 support.The phone has Java MIDP 2.0 support except for the NM705i which has the feature turned off due to the i-mode software.
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