Qualcomm Incorporated

Jitendra Prasad

Anssi Haverinen

Arunn Coimbatore Krishnamurthy

Neven Klacar

Bijan Timsari

Murali Krishna

Jean-Marie Quoc Danh Tran

Raghavendra Bhat Noojady Krishna

Siva Pavan Kumar Mitnala

Systems and methods for providing audio streams over peripheral component interconnect (PCI) express (PCIE) links are disclosed. In particular, exemplary aspects of the present disclosure are used to calculate an uplink timing requirement and adjust a margin time before a modem encodes audio data so that the encoding is done before data is transmitted to an external network. Further aspects of the present disclosure allow a first integrated circuit (IC) to synchronize its clock with that of the modem.

Audio streams over peripheral component interconnect (PCI) express (PCIE) links

Aspects disclosed in the detailed description include packetizing encoded audio frames into compressed-over-pulse code modulation (PCM) (COP) packets for transmission over PCM interfaces. In one aspect, a COP packetizing circuit is configured to receive an encoded audio frame generated from a PCM frame, and generate a COP packet that includes the encoded audio frame irrespective of the audio format. The COP packet is generated with a packet length proportional to a PCM length of the PCM frame, allowing the COP packetizing circuit to transmit the COP packet over an isochronous PCM interface with a lower bit rate than the PCM frame to reduce power. The COP packetizing circuit provides a mobile computing device with a single packetizing scheme that supports multiple audio formats, and allows for reducing power through bit rate scaling.

Packetizing encoded audio frames into compressed-over-pulse code modulation (PCM) (COP) packets for transmission over PCM interfaces

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San Diego, CA, United States of America

Jitendra Prasad