Audio reproducing apparatus

• US 7,308,188 B2
• Filed: 09/30/2002
• Issued: 12/11/2007
• Est. Priority Date: 03/05/2002
• Status: Active Grant

• Current Assignee: D&M Holdings Incorporated (DEI Holdings Incorporated)
• Original Assignee: D&M Holdings Incorporated (DEI Holdings Incorporated)
• Inventors: Namatame, Kazushi
• Primary Examiner(s): Dastouri; Mehrdad
• Assistant Examiner(s): Hasan; Syed Y.
• Application Number:
  US10/259,602
• Publication Number:
  US 20030170007A1
• Time in Patent Office: 1,898 Days
• Field of Search: 386/33, 386/39, 386/96, 386/98, 386/52, 386/55, 386/125, 360/61, 348/14.11, 348/705, 381/123, 381/56, 700/94, 704/210
• US Class Current: 386/338
• CPC Class Codes: G11B 19/02 Control of operating function, e.g. switching from recording to reproducing
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 2020/10546 specifically adapted for audio data
• CPC Class Codes: H04N 21/4135 external recorder interface circuits between an apparatus for recording television signals and a television receiver H04N5/775
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/42638 involving a hybrid front-end, e.g. analog and digital tuners
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/8106 involving special audio data, e.g. different tracks for different languages
• CPC Class Codes: H04N 5/46 for receiving on more than one standard at will deflecting circuits of multi-standard receivers H04N3/27
• CPC Class Codes: H04N 5/60 for the sound signals
• CPC Class Codes: H04N 5/602 for digital sound signals
• CPC Class Codes: H04R 2420/01 Input selection or mixing for amplifiers or loudspeakers for hearing aids H04R25/43

Abstract

Even when both a digital audio signal and an analog audio signal are inputted, a type of inputted digital audio signal is identified, and an internal signal path is automatically switched based on the result of the identification operation and previously set content. A main storage of a host microcomputer 12 stores signal path information indicating a signal path to be selected for each type of digital audio signal inputted from each external AV apparatus. A DIR 3 identifies the type of digital audio signal inputted from a digital input terminal 1. The host microcomputer 12 switches an A/D switching selector 4 and an analog direct/DSP process switching selector 7 respectively so that a signal path corresponding to the type of signal shown in the result of an identification operation of the DIR 3 is selected, based on the signal path information.

Claims

1. An audio reproducing apparatus having an analog input terminal to which an analog audio signal outputted from an AV apparatus is inputted, and a digital input terminal to which a digital audio broadcasting signal outputted from the AV apparatus is inputted, comprising:

an identification means for identifying a type of the digital audio broadcasting signal inputted into the digital input terminal, based on additional information of the digital audio signal, and

a signal path switching means for switching an internal signal path to an analog path so as to reproduce and output the analog audio signal inputted from the analog input terminal, when a result of an identification in the identification means shows that the digital audio broadcasting signal inputted from the digital input terminal is a PCM (Pulse Code Modulation) silence signal, and the PCM silence signal is inputted for more than a predetermined period of time and otherwise keeping the internal signal path so as to reproduce and output the digital audio broadcasting signal inputted from the digital input terminal.

2. An audio reproducing apparatus according to claim 1, further comprises:

a signal processing means for subjecting the digital audio broadcasting signal inputted into the digital input terminal to a signal processing corresponding to a type of signal identified by the identification means.