At the data rate of 64kbps, most information can be kept in the frequency band of 13000-20000Hz.
However, WMA's low frequency performance at 64kbps is somewhat disappointing. It sounds hard, just like adding wow effect, and it feels bad. Of course, it feels more concentrated than mp3 with the same bit. Auditively, the performance of 64WMA is basically close to the sound quality level of 128kbps mp3, but it does not reach it. Wma of 96K is slightly better than mp3 of 128K, and WMA is almost the same at various bit rates higher than 128, with rich high frequency and overtones. Most people can't hear the difference between sound quality and timbre above WMA 128Kbps. Generally speaking, WMA has a hard voice and is suitable for pop rock. If it is classical or pure vocal music, it feels a bit stiff, below. WMA above 128 will feel thinner than MP3.
WMA has completely surpassed the MP3 format in the audition of 128kbps and below, and the king of low bit streams is not in name only. However, when the code stream rose to 128kbp, the sound quality of WMA did not improve as much as that of MP3.
At present, all portable players support the most commonly used audio formats.
WMA (Wireless Messaging API) provides JAVA programs with the function of sending and receiving wireless information. WMA 1. 1 .[ Edit this paragraph] WMA can be used for coded files of various formats. Applications can use the Windows Media Format SDK to encode and decode WMA formats. Some common applications supporting WMA include Windows Media Player, Windows Media Encoder, RealPlayer, Winamp, etc. Other platforms, such as software and hardware in Linux and mobile devices, also support this format. [Edit this paragraph ]WMA 7 supports the advantages of WMA after certificate encryption. Without permission (that is, without a license certificate), even if it is illegally copied to the local area, it is impossible to listen. At the same time, Microsoft's original claim that the same file, the same sound quality, is twice as small as MP3 has also been fulfilled. In fact, this statement only applies to low bit rates. In addition, Microsoft has greatly improved the engine in WMA 9, which is almost smaller than MP3 1/3 under the same file and sound quality, and is very suitable for network streaming media and mobile devices.
Format. [Edit this paragraph] The disadvantage is that the rendering ability of high bit rate is low. Compared with WMA with 192KBPS, MP3 with the same sound source can easily be distinguished as superior in sound quality and rendering power. Like MP3, WMA is a file format that weakens data compression, and WMA is not suitable for demanding users. (Version 9.0 supports lossless compression) In addition, WMA, like MP3, is a patented file format. Supported devices need to purchase copyright.
WMA format is the same as AVI format and MP4 format. It has sound and images. But MP3 doesn't support avi. MP4 format only supports Wma [Edit this paragraph]. The new application of WMA supports a new format: WMA lost.
This is a lossless format CD audio developed by Microsoft, which can make the restored sound exactly the same as CD, and the data volume is only about half that of CD.
The general code rate is between 720 and 890.
Inherited the tradition of Microsoft and supported copyright protection.
The latest codec is Windows Media Audio10 Professional.
Up to 24 bits /96 khz, 5. 1, 7. 1 channel, "unlimited number of channels".
5. 1 surround sound audio is above 384kbps, which is mostly equal to PCM files.
Frequency interpolation mode
WMA China Wushu professional league WMA Wushu professional league
The interpretation of 1 WMA nouns
WMA, the English full name is Wushu Masters Association, and the English abbreviation is WMA. Chinese Wushu Professional League. WMA was initiated by CTV Sports Entertainment Co., Ltd. and officially announced on February 30, 2008. WMA is defined as a club registered in the industrial and commercial or civil affairs department, which completes the production organization of Wushu professional league products through contracts.
WMA is a cooperative entity established spontaneously by contract. Under the leadership of the government, the stability of the club and the competition system is guaranteed through systems and rules. It is the only national and even global operation cooperation entity voluntarily formed by the clubs engaged in martial arts in the world in the form of contracts.
2.WMA commandments
Winning by technology is the lofty mission of WMA competition;
The attack and defense technology of serious Wushu is the highest principle of WMA;
Wushu, Wushu, Wushu are the principles that all athletes, referees and all people who work for WMA must strictly follow!
The purpose of 3.3. WMA
Inherit, inherit and develop the ever-changing fighting skills and techniques of China Wushu; Fully display the profound China Wushu culture; Dedicate the precious Wushu cultural heritage to the whole world.
All WMA events are martial arts competitions designed according to different boxing skills and techniques. The highest level competition is to let the global Wushu players show the fighting skills and techniques of China Wushu to the maximum extent in WMA competition.
4.WMA's goals
We will produce wonderful, intense and ever-changing sports products, promote the development of Wushu, and dedicate the cultural treasure of Chinese Wushu to all mankind. At the same time, Wushu should adhere to the people-oriented principle and build a harmonious society.
The mission of 5.5. WMA
WMA's mission is to lead the inheritance and development of martial arts fighting technology, and to dedicate the martial arts culture of China people to all mankind.
6.WMA slogan
Beyond the legend
7.WMA logo
The logo is basically composed of martial arts boxing ceremony and Tai Chi graphic elements.
First, the state of etiquette;
Second, meet the challenge;
Third, cultivate self-cultivation.
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On June 13, the draw ceremony for the first group match of China Wushu Professional League (WMA) was held in Beijing, which marked the official launch of China Wushu Professional League. The WMA team competition will kick off in Huangshan on July 26th. The competition will be divided into three stages: round robin, semi-final and final.
The lottery ceremony for the first WMA Chinese Wushu Professional League Team Competition was held in Shangri-La Hotel, Beijing. The lottery results of WMA China Wushu Professional League team competition, which was attended by Shandong Xingwutang Club, Guangdong Boniu Club, Hebei Yun Fei Club, Shaanxi Red Wolf Club, Qingdao Hu Xiang Club and Guangzhou Xia Yong Club, were announced. China Wushu Professional League, an independent project, will start its first competition in Huangshan, Anhui Province on July 26th, 2009.