公开(公告)号：US20170111742A1

公开(公告)日：2017-04-20

申请号：US15261936

申请日：2016-09-10

Applicant: ESS Technology, Inc.

Inventor： Dustin Dale Forman ,  Peter John Frith ,  Frederic Schrive ,  Hwang Soo Son

IPC: H04R5/04 ,  H04R29/00

CPC classification number: H04R5/04 ,  H04R29/001 ,  H04R2420/01 ,  H04R2420/05 ,  H04R2499/11

Abstract: An apparatus and method is disclosed for achieving improved sound quality from mobile ‘hifi’ playback devices by driving compatible headphones in ‘balanced’ or ‘differential’ mode via standard size headphone connectors on the device, while retaining full compliance with legacy jack connections and conventional headphones. When a headphone is connected, a smartphone may determine whether the headphone is one capable of accepting balanced audio signals, or one that uses a conventional 3-pole jack or a 4-pole CTIA or OMTP jack. For a headphone that accepts balanced audio signals, the four poles of a 4-pole jack are used to drive left and right audio channels, and inverted left and right audio channels. For conventional 3-pole or 4-pole jacks, switches in the smartphone adapt the audio output signals to the configuration expected by the headphone.

公开(公告)号：US20170111743A1

公开(公告)日：2017-04-20

申请号：US15261937

申请日：2016-09-10

Applicant: ESS Technology, Inc.

Inventor： Peter John Frith ,  Frederic Schrive ,  Hwang Soo Son ,  Dustin Dale Forman

IPC: H04R5/04 ,  H04R29/00

CPC classification number: H04R5/04 ,  H04R29/001 ,  H04R2420/01 ,  H04R2420/05 ,  H04R2499/11

Abstract: An apparatus and method is disclosed for achieving improved sound quality from mobile ‘hifi’ playback devices by driving compatible headphones in ‘balanced’ or ‘differential’ mode via standard size headphone connectors on the device, while retaining full compliance with legacy jack connections and conventional headphones. When a headphone is connected, a smartphone may determine whether the headphone is one capable of accepting balanced audio signals, or one that uses a conventional 3-pole jack or a 4-pole CTIA or OMTP jack. For a headphone that accepts balanced audio signals, the four poles of a 4-pole jack are used to drive left and right audio channels, and inverted left and right audio channels. For conventional 3-pole or 4-pole jacks, switches in the smartphone adapt the audio output signals to the configuration expected by the headphone.