MAYAH Communications

Technology Highlights Overview
DVB-H If you ever wondered why Mayah products can be so easy deployed in various DVB-H environments, that’s the answer. Basic multimedia streaming protocol for DVB-H is a well-known RTP and it’s extensions. These are implemented in Centauri Audio Gateway Codec and in Audio Video En/Decoders IO [io] 8000 / 8001since 2004 for all current and potential applications.	6 ms audio latency via IP connections Audio codec quality is measured quite often in terms of the delay time for the encoding and decoding process. Live applications, such as reporting and interviews are considered to be most critical. MAYAH's CENTAURI II sets a new standard in low delay offering 6ms for apt-X/Eapt-X and linear audio via IP.
MAYAH CENTAURI II and MERK II go SIP This protocol is developed by the IETF (Internet Engineering Task Force) as an alternative to the H.323 Standard. Together with other protocols it allows to establish, control, terminate and modify point-to-point and multipoint connections.	IP Overhead At IP-transmissions the data stream consists of Payload (pure audio data e.g. one or more MPEG frame) and IP Overhead. In case of UDP protocol the absolute overhead is as large as 46 Bytes / packet and it consists of 8 Bytes UDP header, 20 Bytes IP header and 18 Bytes IEEE802.3 (Ethernet). RTP protocol has 58 Bytes overhead per packet. 12 Bytes - RTP, 8 Bytes UDP, 20 Bytes IP and 18 Bytes IEEE802.3. The relative IP Overhead is calculated in percents of the original payload.
Forward Error Correction (FEC) FEC permits error detection and/or correction by adding redundant data to the stream. Thereby avoiding re-transmission or corruption of data and the associated costs of higher bandwidth needs and increased delay.	Session Initiation Protocol (SIP) Almost a year has passed since we addressed one of the hottest topics of the industry – usage of an SIP protocol for professional transmission of audio (and in future video signals) over IP-based networks. Now after a successful series of Audio-via-IP seminars & Workshops and the establishment of the Audio-via-IP Experts Group, MAYAH shares some ‘know-hows’ and experiences with its customers and partners.
SIP for compatibility of IP Audio Codecs The European Telecommunications Standards Institute (ETSI) was founded 1998, and already one year after there was the DSS1 standard (so called Euro-ISDN) introduced. However it was just the start of the long long process.	Requirements for SIP based connections via the public Internet The first part of a successful SIP testing / integration is the selection of an appropriate IP-connection. In Germany for example there are quite a lot of regional and big service providers that offer S-DSL links with useful capacities starting at 2 Mbit/s.
IO [io] 8000/8001 as an affordable on-site video preview solution Growing availability of a broadband IP-networks, including the hi-quality internet access types allow the broadcasters quite a few applications helping to save money on their daily operations. One of the routine tasks in the live outside production is to get the backhaul video from the studio. Normally there are only three options available	Multicast and multiple Unicast streaming with MAYAH Audio Codecs While multicasting technology exists for a long time already and from the very beginning MAYAH devices do support it not everyone knows how to establish a multicasting connection.