US 12,120,622 B2
Radio apparatus for communicating digital audio streams
Nils Strøm, Trondheim (NO); Anders Nore, Trondheim (NO); and Rolf Ambühl, Trondheim (NO)
Assigned to Nordic Semiconductor ASA, Trondheim (NO)
Appl. No. 17/637,224
Filed by Nordic Semiconductor ASA, Trondheim (NO)
PCT Filed Aug. 20, 2020, PCT No. PCT/EP2020/073372
§ 371(c)(1), (2) Date Feb. 22, 2022,
PCT Pub. No. WO2021/037681, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 1912169 (GB), filed on Aug. 23, 2019.
Prior Publication US 2022/0286986 A1, Sep. 8, 2022
Int. Cl. H04W 56/00 (2009.01); G06F 3/16 (2006.01); H04R 1/02 (2006.01); H04R 3/00 (2006.01); H04S 1/00 (2006.01)
CPC H04W 56/002 (2013.01) [G06F 3/162 (2013.01); H04R 1/025 (2013.01); H04R 3/00 (2013.01); H04S 1/007 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio receiver apparatus comprising:
radio circuitry for receiving a sequence of radio data packets, transmitted at regular intervals, the sequence of radio data packets encoding a digital audio stream,
wherein each radio data packet encodes a respective number of audio samples from the digital audio stream;
a digital audio interface for outputting audio samples from the received digital audio stream;
a controllable oscillator arranged to control an output rate at which the audio samples are output from the digital audio interface;
a timer; and
control logic configured to
use the timer to measure a reception interval between receiving each of a pair of the radio data packets, and,
for at least one radio data packet of the sequence, to control the oscillator to vary said output rate incrementally, in a respective number of steps of non-zero size, while outputting the audio samples from the respective radio data packet,
wherein the respective number of steps is at least two steps, and
wherein the respective number of steps, or the respective size of each step, or both, depends on said measured reception interval and is such that the output rate is always positive.