This idea:
1. Bypassing the mark to get the actual number of words, such as the need to display the contents of the first 100 words, bypassing the tag to retrieve the 100th word of the actual index. The string before this index is then intercepted.
to: Digital radio set up, online audition, low-demand music appreciation4-7 mp3PROAs MP3 's improved version of mp3PRO showed a pretty good quality, treble plump, although mp3pro is through the SBR technology in the playing process inserted, but the actual listening sense is quite good, although it seems a little thin, but in the 64kbps world has no opponents, Even more than the 128kbps mp3, but unfortunately, mp3PRO's low-frequency performance is like MP3, fortunately, the high-frequency inter
There are two types of data compression:Lossless CompressionAndLossy Compression.
Lossless Compression
The so-called lossless compression format uses statistical redundancy to compress the data. It can completely restore the original data without causing any distortion. However, the compression rate is limited by the theory of statistical redundancy, generally from. this method is widely used for text data,
1.2.1 Common formatsCommon audio formats are: CD format, WAVE (*. WAV), AIFF, AU, MP3, MIDI, WMA, RealAudio, VQF, Oggvorbis,AAC, APE.
CDThe audio quality of the CD format is relatively high. So to speak the audio format, CD is naturally the leading pioneer. In most playback software, the "hitOpen file Type ", you can see the *.CDA format, which is the CD track. Standard CD format is 44.1K sampling frequency, rate 88k/Seconds, the 16-bit quantization b
converted to any other lossless format without quality loss, or to a smaller lossy file for use on a portable, such as iPod.
Compatibility
Hardware: Later model Apple iPods, Sonos, Apple AirPort Express. Apple Shuffles due to limited memory are not compatible with ALAC.
Other Mainstream Lossless
How to Burn ape and FLAC files to CD
Lossless data compression index data is not lost after compression, and can be completely restored to the original before compression. It is opposite to lossy data compression. The compression ratio is usually less than the compression ratio of Lossy data compression.
Common formats of audio lossless compression include: ape, FLAC, wavepack, frog, La, lapc...
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point is that this format can be based on the audience's bandwidth to control their own bitrate, in order to ensure smooth conditions to maximize the sound quality. RA can support multiple audio encodings, including ATRAC3. Like WMA, not only does RA support edge-reading, it also supports the use of special protocols to conceal the real network address of a file, enabling only online playback without the download. This is important for record compani
At present, music file playback format is divided into two kinds of lossy compression and lossless compression. Using different formats of music files, there is a great difference in the performance of sound quality.
Common to MP3, WMA, Ogg is called lossy compression, lossy compression by definition is to reduce audio sampling frequency and bit rate, the output of audio files will be smaller than the orig
quality. RA can support multiple audio encodings, including ATRAC3. Like WMA, not only does RA support edge-reading, it also supports the use of special protocols to conceal the real network address of a file, enabling only online playback without the download. This is important for record companies and record sales companies, where RA and WMA are the most popular audio media formats available on the Inter
The popular music magazine Rolling Stone and mtvmusic TV jointly selected the world's greatest 1963 popular songs since one hundred. The classic old song "yesterday" (yesterday) of the "beetle" band has been sung for years. It has been a constant and ranked first in the S.
Rolling Stone and MTV plan the selection. The reason why we set the selection time range to 1963 to the present is that the first time the "beetle" band debuted in the United States in 1963 marks the beginning of the modern
Since netbook was launched, Ubuntu has made many optimizations for such images, therefore, more versions of ubuntu will be available for users in the future. However, in the current Ubuntu series, Firefox is not the only option for devices to be installed, therefore, it may also be other plug-ins or users can install them themselves, while Ubuntu only provides suggestions, in this way, the tuning may also be performed on the audio player that he originally set, therefore, we can also see updates
redundancy of the theoretical limit, generally 2:1 to 5:1. Such methods are widely used in text data, programs and special applications such as image data, such as fingerprint images, Medical images, etc.) are compressed. Due to the limitation of compression ratio, only using lossless compression method is not possible to solve all the problems of image and digital video storage and transmission. The lossless
PCM encoding (original Digital Audio Signal Stream)
Type: Audio
Maker: ITU-T
Required bandwidth: 1411.2 kbps
Feature: sound source information is complete, but redundant
Advantages: sound source information is fully saved and sound quality is good
Disadvantages: Large Information volume, large Redundancy
Application: VoIP
Royalty: free
Note: in computer applications, PCM encoding can reach the highest fidelity level, which is widely used for material storage and music appreciation. CD,
There is a good audio FAQ. If you have time, go up and check it out.
Link: http://forum.doom9.org/showthread.php? T = 68300
The following part is reproduced:
General Audio procedures FAQCross-format techniques for encoding, decoding, and playback.
1. What is the difference between lossy, lossless, and uncompressed audio formats?
Uncompressed audio is simply audio without any compression applied to it. uncompressed audio is commonly used in A
of coding technology, second, it is a decoding Technology jointly researched by the patent holder of MP3, the French Thomson Multimedia Company and the German Fraunhofer ic association. Mp3pro can improve the sound quality of MP3 music without changing the file size. It compresses audio files at a lower bit rate to maximize the sound quality before compression.
5. mp3pro is developed by Coding Technology Co., Ltd. in Sweden. It includes two major technologies: First, it comes from the unique
mobile devices. such as WAV, AU, ape and other files. (2) lossy format, for data compression, after compression lost some data, such as MP3, WMA and other files. 1.WAV file WAV files are currently the most popular lossless compression format. WAV files are flexible in format and can store multiple types of audio data. Because of the large file size, it is not suitable for devices with small storage capacit
. The loss data rate is related to the compression ratio. The smaller the compression ratio, the more data is lost, and the worse the decompression effect. In addition, some lossy compression algorithms adopt repeated compression for multiple times, which may cause additional data loss.
Lossless formats, such as WAV, PCM, TTA, FLAC, AU, ape, Tak, wavpack (WV)
Lossy formats, such as MP3, Windows Media Audio (WMA
length and muteThe size of the file is the same2.2 Lossless compression (Ape,la,flac,apple lossless,wma Lossless)Reduce file size without loss of quality. As far as audio files are concerned, they can be pressed to the 50%~60% of the original file.2.3 lossy compression (MPEG audio, Vorbis,
quality, you can discard MP3 and stop CD directly. CD carries waveform files in a completely lossless format, this will produce better results.If you want to reduce the distortion, increasing the bit rate is the only way. It is best to use a variable bit rate (VBR) to compress the MP3 file to achieve a balance between the maximum fidelity and the minimum file size.Finally, if you want to completely lossless
is called "track capture". The resulting WAV file is about MB. Although the sound quality of such a huge file is good, it is not conducive to network transmission! As a result, various compression technologies have emerged. The most famous ones are MP3 and RM and WMA. These compression techniques are used to sample some fragments, lossy compression ". Although kb MP3 is known as "close to the CD sound quality", as long as it is connected to a slightl
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