Digital audio recording and reproducing apparatus

• US 20060116780A1
• Filed: 01/13/2006
• Published: 06/01/2006
• Est. Priority Date: 11/10/1998
• Status: Abandoned Application

• Current Assignee: TDK Corporation
• Original Assignee: TDK Corporation
• Inventors: Kobayashi, Nobuyuki, Fujii, Ken
• Application Number:
  US11/330,999
• Publication Number:
  US 20060116780A1
• Time in Patent Office: Days
• US Class Current: 700/94
• CPC Class Codes: G11C 2207/16 Solid state audio deprecated, only for historical reasons, G06F3/16, G11B
• CPC Class Codes: G11C 7/16 Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters

Abstract

In a digital audio recording and reproducing apparatus, an analog audio signal supplied from a microphone is converted into digital audio data, and after compressing the digital audio data such that the analog audio signal of sixty seconds is converted into digital data of not larger than 100K bytes, compressed digital audio data is stored in an-internal solid state memory and/or external solid state memory as data file having a file format which can be directly treated by an external computer. Upon reproduction, after decompressing the digital audio data read out of the memory, decompressed digital audio data is converted into an analog audio signal, and the thus converted analog audio signal is reproduced by a speaker or earphone. The digital audio data file stored in the memory can be directly and easily transferred to the computer within a short time by means of the external memory, connection cable, communication line and transmitter without using special connection cable and data format converting driver software. Digital audio data can be also transferred from the computer to the digital audio recording and reproducing apparatus in a similar manner.

Claims

1-12. -12. (canceled)

13. A digital audio recording and reproducing apparatus comprising:

an A/D converter for converting an analog audio signal collected by a microphone into digital audio data;

a digital compression circuit for compressing said digital audio data into compressed digital audio data;

an internal solid state memory for storing said compressed digital audio data;

a digital decompression circuit for decompressing said compressed digital audio data read out of said internal solid state memory to generate decompressed digital audio data;

a D/A converter for converting said decompressed digital audio data into an analog audio signal;

a reproducing means for reproducing said analog audio signal supplied from said D/A converter; and

an external memory connecting terminal for connecting detachably an external solid state memory for storing said compressed digital audio data instead of or together with said internal solid state memory;

wherein said apparatus includes;

a normal reproduction mode in which a single digital audio data file selected from digital audio data files stored in said internal solid state memory and/or external solid state memory is reproduced only once;

a single file repeat mode in which a single digital audio data file selected from digital audio data files stored in said internal solid state memory and/or external solid state memory is reproduced repeatedly;

a plural file continuous repeat mode in which a plurality of digital audio data files stored in said internal solid state memory and/or external solid state memory are successively reproduced only once; and

a plural file repeat mode in which a plurality of digital audio data files stored in said internal solid state memory and/or external solid state memory are successively reproduced in a repeated manner,

wherein during said plural file continuous reproduction mode or plural file repeat reproduction mode, when a repeat button is operated by a user in response to a reproduction of a desired speech, said plural file continuous reproduction mode or plural file repeat reproduction mode is automatically interrupted and said single file repeat reproduction mode is automatically started to reproduce repeatedly a currently reproduced digital audio data file.

14. A digital audio recording and reproducing apparatus according to claim 13, wherein in said plural file repeat reproduction mode, all digital audio data files stored in said internal solid state memory and/or external solid state memory are successively reproduced in a repeated manner.

15. A digital audio recording and reproducing apparatus according to claim 13, wherein in said plural file repeat reproduction mode, a plurality of digital audio data files selected from all digital audio data files stored in said internal solid state memory and/or external solid state memory are successively reproduced in a repeated manner.

16. A digital audio recording and reproducing apparatus according to claim 13, wherein in said plural file repeat reproduction mode, the order of reproducing a plurality of digital audio data files is set by a user.

17. A digital audio recording and reproducing apparatus according to claim 13, wherein a plurality of digital audio data files are stored in said internal solid state memory and/or external solid state memory with ordinal file numbers, and in said plural file continuous reproduction mode, a plurality of digital audio data files from a digital audio data file having a file number denoted by a user to a digital audio data file having the last file number are successively reproduced.

19. A digital audio recording and reproducing apparatus according to claim 13, wherein when said automatically started single file repeat reproduction mode is stopped in response to a user'"'"'s operation, the interrupted plural file continuous reproduction mode or plural file repeat reproduction mode is restarted.

18. (canceled)

20-22. -22. (canceled)