| Extension | .qcp |
| Category | audio |
| Description | An audio file with a .QCP extension is stored in the Qualcomm PureVoice format. This format, developed by Qualcomm, is commonly utilized for voice notes or mobile phone ringtones. QCP is designed to provide maximum voice clarity at low bitrates, making it perfect for voice recordings. It is frequently used in mobile phones for ringtones and voice notes, efficiently managing voice bandwidth usage while maintaining acceptable audio quality. |
| Technical details | The QCP (Qualcomm PureVoice File) format is used to encode audio data, particularly voice. Here are some technical details about this format: Codecs: QCP supports EVRC (Enhanced Variable Rate Codec) and QCELP (Qualcomm Code Excited Linear Prediction) codecs. EVRC is designed to improve voice quality at lower bitrates, while QCELP offers higher audio quality at moderate bitrates. Bitrate: QCP files have a variable bitrate that adjusts to the quality of the communication link, allowing for optimal use of network bandwidth. Container Format: QCP files can include metadata and multirate data, enabling storage of bitrate information and other encoding parameters. This format is commonly used in mobile phones for storing and transmitting voice recordings, as well as for ringtones. Playing QCP files is possible on many mobile devices and some computer player programs that support the appropriate codecs. The details of the QCP format are outlined in RFC 3625, which is a standard that defines the file format and MIME types for speech data. |
