Glossary

Key terms in recording-data liberation, platform migration and compliance eDiscovery.

NMF (NICE Media File): A proprietary audio container (.nmf) used by NICE recording platforms. It may internally wrap G.729A, A-law, µ-law or ADPCM audio and requires a dedicated parser to extract into standard WAV.
Data Format Liberation: The process of extracting audio and data locked inside proprietary recording systems and converting it into open, future-proof standard formats (e.g. WAV, MP3, JSON metadata).
Recording Platform Migration: Moving historical recordings and their metadata from one (often decommissioned) recording system to a new platform or cloud, completely and in a compliant manner.
eDiscovery: Retrieving, reviewing and producing electronically stored information — including call recordings and chat — for litigation, regulatory inquiry or compliance review, typically requiring searchability, export and chain-of-custody.
Compliance Retention: The obligation to retain call/chat records for a mandated period under regulations (e.g. financial MiFID II, telecom, healthcare) while keeping them searchable and retrievable.
CCaaS (Cloud Contact Center): Contact Center as a Service — a cloud-delivered contact-center platform. Migrating to CCaaS usually requires first liberating historical recording data from the old platform.
Speech-to-Text (STT): Technology that transcribes audio into text — the foundation of speech analytics, quality inspection, search and compliance review. Proprietary formats must first be converted to standard audio for high-quality transcription.
Dual-Channel Recording: Recording the agent and customer on separate left/right channels, which simplifies speaker separation, quality inspection and sentiment analysis. Channel separation must be preserved during format liberation.
Transcoding: Converting audio from one codec/container to another (e.g. G.729 → PCM WAV) — a core step in format liberation and platform migration.
PII Redaction: Detecting and masking personally identifiable information (e.g. card or ID numbers) in recordings or transcripts to meet privacy and compliance requirements.
Interaction Analytics: Automated analysis of large volumes of calls/chats to surface topics, sentiment, compliance risk and service-quality insight — dependent on high-quality voice data and transcription.
AES (Advanced Encryption Standard): The symmetric cipher most commonly used to encrypt recordings at rest (typically AES-128 or AES-256). The same key both encrypts and decrypts, so whether historical recordings can be opened depends on whether the key still exists — not on the algorithm.
Envelope Encryption: Each file is encrypted with a randomly generated AES session key, and that session key is itself wrapped with an asymmetric key pair (usually issued as a certificate) and stored alongside the file. Decryption requires unwrapping the session key with the private key first. Recording platforms commonly use this model, so migration requires the matching private key or certificate.
KMS / HSM: A managed service (KMS) or dedicated hardware (HSM) that centrally holds encryption keys, which never touch disk and are accessed through an interface. The upside is security and auditability; the risk is that once the device is returned, zeroized or the service is shut down, any historical recordings depending on it can no longer be decrypted.
Chain of Custody: A documented trail of how data was handled and by whom, from creation to production, ensuring its integrity and admissibility in eDiscovery and compliance contexts.