Patent ID: 9420224
Filing Date: 2016-08-16
CPC Classification: H04L,H04N

Claim Text:
1. Source of audio video data including high definition (HD) video data, standard definition (SD) video data, audio data, and auxiliary data, comprising: processor; modulator assembly including a quadrature amplitude modulator (QAM) and being configured to receive data symbols from the processor, the data symbols representing high definition (HD) video data, standard definition (SD) video data, audio data, and auxiliary data, the modulator assembly configured to: map symbols representing the auxiliary data to a highly robust modulation technique (QPSK) with constellation points in a first region of a symbol constellation; map symbols representing the audio data to a robust modulation technique (PSK) with constellation points in a second region of the symbol constellation; map symbols representing the SD video data to a modulation technique (PSK) with constellation points in a third region of the symbol constellation; map symbols representing the HD video data to a modulation technique (QAM) with constellation points in a fourth region of the symbol constellation; the first region being more robust to noise than the second region, the second region being more robust to noise than the third region, the third region being more robust to noise than the fourth region.