ตัวแปลงไฟล์ออนไลน์ฟรี 3GP เป็น HTK

3GP is a multimedia container developed by Third Generation Partnership Project in 1998 for GSM-based (Global System for Mobile Communications) phones. The container requires little bandwidth, storage space and data usage that is why it is ideal for cell phones. It is a standard container for the files sent using MMS (Multimedia Messaging Service).

Single channel 16-bit PCM format used by HTK, a toolkit for building Hidden Markov Model speech processing tools