RFC 978 (rfc978) - Page 1 of 5
Voice File Interchange Protocol (VFIP)
Alternative Format: Original Text Document
Network Working Group J. K. Reynolds (ISI) Request for Comments: 978 R. Gillmann (Inner Loop) W. A. Brackenridge (Alembic) A. Witkowski (Inner Loop) J. Postel (ISI) February 1986 VOICE FILE INTERCHANGE PROTOCOL (VFIP) STATUS OF THIS MEMO This memo describes a proposed voice file interchange format for use in the ARPA-Internet community. Suggestions for improvement are encouraged. Distribution of this memo is unlimited. 1. INTRODUCTION The purpose of the Voice File Interchange Protocol (VFIP) is to permit the interchange of various types of speech files between different systems. Currently, there are many different types of voice implementations, but no specific standard has been set with an eye towards compatability between these systems. With the increasing interest and development of voice, specifically in Multimedia Mail, there is an increased need to include standardized speech into a common data structure. The Voice File Interchange Protocol defines a header to describe the voice data. The 18-byte header contains the identifier, the header version number, the header length, a DTMF mask for Touch-Tones, the recording rate in bits per second, the total time in deci-seconds (tenths of a second), and the encoding/recording method (see Figure 1). 2. THE VOICE FILE INTERCHANGE PROTOCOL HEADER The Voice File Interchange Protocol header is organized as follows: 2.1 The Header Version Number The version number is 1-byte. This first version is number one. 2.2 The Header Length The length is a 1-byte field indicating the length of the entire header in bytes. For this first version, the length is 18 (bytes). Reynolds, et al.