Ericsson Multi-Format Receiver RX1290 User Manual

 

Technical Specification

 

B.2 

Audio Decoding and Output Stage 

•  The Multi-Format Receiver is capable of simultaneously decoding four PES 

streams of audio from the transport stream. Each of the decoders is identical in 
operation, but act completely independently of the other.  

•  Each channel supports extraction of four types of coded audio from the 

Transport Stream as follows: 

•  MPEG-1, Layer 2 Audio (Musicam): ISO/IEC 13818-3 

•  Dolby Digital AC-3 Audio: ATSC document A/52 

•  Linear Audio: SMPTE 302M – 2000 

•  DTS Audio pass-through 

• AAC 

• HE-AAC 

•  Dolby E pass-through 

Audio component selection is automatic or may be specified from the User Interface 
or remote interfaces. The Multi-Format Receiver automatically detects the audio 
type of the selected audio component and applies the appropriate algorithm. Audio 
component selection is based on the position of the component descriptor in the 
PMT. Audio 1 takes the first component, Audio 2 the second, Audio 3 the third and 
Audio 4 the fourth. These may be overridden by selecting User-specified component 
PIDs.  

The Multi-Format Receiver supports decoding of MPEG audio as follows: 

•  Compression layers: MPEG-1 layers I and II 

•  Sampling rate (kHz): 48 

•  Maximum compressed data rate: 384 kbps (layer II) 

The Multi-Format Receiver is able to decode and output the primary stereo pair of a 
Dolby Digital AC-3 encoded audio stream. When there is data encoded on the audio 
surround channels, the Decoder applies down mixing, so that either a surround 
encoded stereo pair (LtRt down mix) or a conventional stereo pair (LoRo down mix) 
is available at the output. 

EN/LZT 790 0003/2 R1A

   

 

 

 

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