G.4 PSS client buffering requirements

26.2343GPPProtocols and codecsRelease 17Transparent end-to-end Packet-switched Streaming Service (PSS)TS

When the annex is in use, the PSS client shall be capable of receiving an RTP packet stream that complies with the PSS server buffering verifier when the RTP packet stream is carried over a constant-delay reliable transmission channel. Furthermore, the video decoder of the PSS client, which may include handling of post-decoder buffering, shall output frames at the correct rate defined by the RTP time-stamps of the received packet stream.

Annex H (informative):
Content creator guidelines for the synthetic audio medium type

It is recommended that the first element of the MIP (Maximum Instantaneous Polyphony) message of the SP-MIDI content intended for synthetic audio PSS/MMS should be no more than 5. For instance the following MIP figures {4, 9, 10, 12, 12, 16, 17, 20, 26, 26, 26} complies with the recommendation whereas {6, 9, 10, 12, 12, 16, 17, 20, 26, 26, 26} does not.

Annex I (informative):

Annex J (informative):
Mapping of SDP parameters to UMTS QoS parameters

This Annex gives recommendation for the mapping rules needed by the PSS applications to request the appropriate QoS from the UMTS network (see Table J.1).

Table J.1: Mapping of SDP parameters to UMTS QoS parameters for PSS

QoS parameter

Parameter value


Delivery of erroneous SDUs


Delivery order


Traffic class

"Streaming class"

Maximum SDU size

1400 bytes

According to RFC 2460 the SDU size must not exceed 1500 octets. A packet size of 1400 guarantees efficient transportation.

Guaranteed bit rate for downlink

1.025 * session bandwidth

This session bandwidth is calculated from the SDP media level bandwidth values.

Maximum bit rate for downlink

Equal or higher to guaranteed bit rate in downlink

Guaranteed bit rate for uplink

0.025 * session bandwidth

Maximum bit rate for uplink

Equal or higher to guaranteed bit rate in uplink

Residual BER


16 bit CRC should be enough

SDU error ratio

1*10-4 or better

Traffic handling priority

Subscribed traffic handling priority


Transfer delay

2 sec.

Annex K (normative): Void (Substituted by Annex R)

Annex L (informative):
SVG Tiny 1.2 content creation guidelines