Method of estimating digital audio availability for supplemental audio programs in HD radio broadcast
US10638188B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 10, 2018 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | Aug 10, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H2201/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A radio signal processing circuit comprises multiple audio blend channels, an audio decoder, a program selector and a blending circuit. The audio blend channels are configured to receive digital audio packets for multiple supplemental audio programs. Each audio blend channel includes an audio blend buffer and a signal quality metric circuit. The signal quality metric (SQM) circuit configured to determines an audio quality indicator for the digital audio packets of the program and indicates availability of the program according to the audio quality indicator regardless of whether the program is selected for play. The program selector configured to provides digital audio packets from a selected audio blend channel to the audio decoder to produce a digital audio signal. The blending circuit blends the digital audio signal produced for the selected audio blend channel with a signal representing silence according to the audio quality indicator for the audio blend channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.