HDC (Hybrid Digital Coding) with SBR (spectral band replication) is a proprietary lossy audio compression codec developed by iBiquity for use with HD Radio. It replaced the earlier PAC codec in 2003. It is thought to be a modified form of MPEG-4 HE-AAC. ^[1]

[edit] References

1. ^ Radio and WIreless: AM Bandwidth and Digital Radio

[edit] External links

• News story about switch to HDC

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