SIST EN 300 964 V8.0.1:2003

SIST EN 300 964 V8.0.1:2003 is the Slovenian standard identical to EN 300 964 Version 8.0.1 from ETSI. It specifies discontinuous transmission (DTX) for full rate speech traffic channels in GSM Phase 2+, using the GSM 06.31 version 8.0.1 Release 1999 framework. It is written for people who implement, test, or manage GSM full rate speech behaviour in equipment and networks.

What does SIST EN 300 964 V8.0.1:2003 specify?

SIST EN 300 964 V8.0.1:2003 covers DTX for full rate speech traffic channels in the GSM system. The standard ties the Slovene publication to EN 300 964 Version 8.0.1 and to GSM 06.31 version 8.0.1 Release 1999.

The technical material focuses on how speech transmission changes between active speech and discontinuous transmission. The visible figures and text references show frame timing, voice activity detection, hangover handling, speech frames, and SID frame handling, so the document is aimed at defining the operational behaviour of the codec and radio path during speech and silence.

What are the key requirements of SIST EN 300 964 V8.0.1:2003?

SIST EN 300 964 V8.0.1:2003 sets out how a GSM full rate speech channel shall behave when DTX is used. In practice, this is the reference for matching transmitter and receiver behaviour around speech detection and silence periods.

• DTX operation for full rate speech traffic channels - The standard defines the DTX behaviour for the channel type named in the title. Implementers need to follow the same speech/silence logic so that network and terminal functions work together.
• Voice activity detection (VAD) - The document uses VAD to decide whether the current input is speech or not. That decision drives the transition into or out of DTX, so codec logic must use a consistent speech-detection rule.
• Hangover handling - The figure text shows a hangover period after speech detection. In practice, this prevents the system from dropping out of speech mode too quickly when a speaker pauses briefly.
• Speech frames and SID frames - The standard distinguishes speech frames from SID frames. Equipment has to treat these differently because SID frames represent silence-period information rather than active speech.
• Frame timing and elapsed periods - The document includes timing relationships between frames and elapsed periods. This matters for synchronization, state changes, and conformance testing.
• State transitions - The technical content shows movement between speech, SID, and DTX-related states. Readers use this to check that equipment changes mode at the expected moments.

What terms does SIST EN 300 964 V8.0.1:2003 define?

SIST EN 300 964 V8.0.1:2003 uses several GSM speech terms that are central to the mechanism.

• Discontinuous Transmission (DTX) - A method for suspending regular transmission during silence while keeping the speech channel ready to resume.
• Full rate speech traffic channel - The GSM traffic channel type covered by this standard for full rate speech.
• Voice activity detection (VAD) - The function that decides whether the signal contains speech or silence.
• SID frame - A silence descriptor frame used to carry information about silence periods.
• Hangover - The short continuation of speech handling after speech is detected, used to avoid premature cut-off.
• GSM - Global System for Mobile Communication, the mobile system named in the title.

Who uses SIST EN 300 964 V8.0.1:2003?

SIST EN 300 964 V8.0.1:2003 is used by GSM equipment vendors, codec developers, network engineers, and test laboratories. Quality managers and buyers use it when they need a product or software function to behave consistently for GSM full rate speech DTX. It is also relevant to integration teams checking interoperability between network-side and terminal-side speech handling.

What changed in SIST EN 300 964 V8.0.1:2003 from the previous edition?

SIST EN 300 964 V8.0.1:2003 is updated to version 8.0.0 CR from SMG#31. The scope links this edition to that change-request update for the GSM 06.31 text.

What does the SIST EN 300 964 V8.0.1:2003 document contain?

SIST EN 300 964 V8.0.1:2003 contains the technical description of DTX behaviour for GSM full rate speech traffic channels. The visible material includes frame-timing figures and the speech-to-silence handling around VAD, hangover, speech frames, and SID frames.

The content is the kind used for implementation, verification, and conformance work. It gives engineers the reference behaviour for the control logic that decides when speech is transmitted continuously and when DTX-related handling applies.