Digital sub-band transmission system with transmission of an additional signal
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United States of America Patent
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Jun 25, 1996
Issued Date -
N/A
app pub date -
Jun 6, 1995
filing date -
Jun 2, 1989
priority date (Note) -
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Abstract
A transmission channel may be utilized for a combination of wide-band signals and auxiliary signals, while still providing improved reproduction accuracy. Digital sub-signals or subband signals representing at least first and second data-reduced components are combined with at least one auxiliary digital signal in defined frame portions before transmission. The auxiliary signal may be user-discernible information such as third and fourth audio channels, so that a four channel surround sound signal is transmitted; or teletext or video or picture information may be provided. Sampling reduction and filtering into subbands may be applied to the auxiliary signal as well as to the first and second signal components.
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