WMA is Windows Media Audio. WMA is a new audio format developed by Microsoft well known as MP3. With a higher rate in files compression and better sound quality than the latter, even far beyond those of RA. 

To convert vob to wma file, you may first install a DVD player based on Microsoft DirectShow technology on your Windows. VISTA has bundled vob decoder.

Download WMA Converter which can convert vob to wma file. Select a vob file, set the start time, the end time or audio encoding bitrate if needed. The bitrate is bigger, the file size is bigger, the audio quality is higher, and vice versa. Click the Convert button to convert vob to wma. If the vob files are protected or encrypted, the conversion will fail.

3GP is a video coding format of 3G(3rd Generation)'s streaming media. 3GP is developed especially for mobile phones to adapt to the high transmission speed of 3G network. Though rm format files are also played and mostly in smartphones, 3GP format is a multi-media standard made by 3GPP and is the most popular among mobile phone market at present. 3GP provides the users with high quality video, audio and other contents of multi-media. Besides, 3GP files could also be played on computer with the relative players like Media Player Classic, MPlayer, QuickTime, RealPlayer, etc.

To convert 3gp to wma easily, please install 3GP codec such as FFDSHOW, or HDX4, or QuickTime Alternative.

3GPP means Generation Partnership Project. 3GPP is the third generation (3G) cell phone system specification between many countries.

3GPP2 means The Third Generation Partnership Project 2: 3GPP2 is a collaborative third generation (3G) telecommunications specifications-setting project, and comprising North American and Asian interests developing global specifications for 3G. 3GPP2 is global specifications for the radio transmission technologies (RTTs).