Method and device for processing internal channels for low complexity format conversion
AssigneeSamsung Electronics Co., Ltd.
InventorsSun-min Kim, Sang-bae Chon
Life of this patent
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Abstract
A method of processing an audio signal includes receiving an audio bitstream encoded via MPEG Surround 212 (MPS212); generating an internal channel (IC) signal for a single channel pair element (CPE), based on the received audio bitstream, equalization (EQ) values for MPS212 output channels defined in a format converter, and gain values for the MPS212 output channels; and generating stereo output channels, based on the generated IC signal.
Claims10
A method of decoding a QCE (Quadruple Channel Element) including a first CPE (Channel Pair Element) and a second CPE, the method comprising:
- obtaining first SBR (spectral band replication) payload and first MPS212 payload for stereo output layout by decoding the first CPE;
- obtaining second SBR payload and second MPS212 payload for stereo output layout by decoding the second CPE;
- generating a pair of band-limited internal channel (IC) signals based on the first MPS212 payload, the second MPS212 payload, and a pair of internal channel gain (ICG)s;
- downmixing the first SBR payload and the second SBR payload into downmixed SBR parameters using rendering parameters of a format converter;
- and
- generating a pair of full-band internal channel signals based on the generated pair of band-limited internal channel signals and the downmixed SBR parameters.
An apparatus for processing an audio signal, the apparatus comprising:
- a receiver configured to receive a QCE (Quadruple Channel Element) including a first CPE (Channel Pair Element) and a second CPE;
- and
- an internal channel (IC) signal generator configured to
- obtain first SBR (spectral band replication) payload and first MPS212 payload for stereo output layout by decoding the first CPE;
- obtain second SBR payload and second MPS212 payload for stereo output layout by decoding the second CPE;
- generate a pair of band-limited internal channel (IC) signals based on the first MPS212 payload, the second MPS212 payload, and a pair of internal channel gain (ICG)s;
- downmix the first SBR payload and the second SBR payload into downmixed SBR parameters using rendering parameters of a format converter;
- and
- generate a pair of full-band internal channel signals based on the generated pair of band-limited internal channel signals and the downmixed SBR parameters.
Dependencies are inferred from the claim text.