Electrical audio signal processing systems and devices – Acoustical noise or sound cancellation – Counterwave generation control path
Patent
1997-07-18
1999-07-27
Lee, Ping
Electrical audio signal processing systems and devices
Acoustical noise or sound cancellation
Counterwave generation control path
381 7114, A61F 1106
Patent
active
059303727
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a communication terminal device which transmits or receives input voice data for communication processing.
BACKGROUND ART
In recent years, hand-held types of data processing equipment, called PDAs (Personal Digital Assistants), have been utilized as equipment for sending electronic mail and faxes by sending data entered or stored by their data processing functions through wireless or radio communication means such as cellular phones.
However, in order to achieve data communication through data processing equipment of the hand-held type, it is required to carry wireless communication means such as a cellular phone. In addition, it is necessary to make a connection between the data processing equipment and the wireless communication means when communication is actually performed. These requirements are very troublesome.
Furthermore, the proper use of voice communication and data communication cannot be made smoothly.
Accordingly, a wireless communication terminal has been developed in which a cellular phone and a hand-held data processing equipment are integrated with each other.
Such integrated hand-held communication terminals can perform both voice communication and data communication. However, since a voice entry microphone, data entry keys, and a touch panel are mounted on the same cabinet, when key entries or pen entries of data are made in the voice communication mode, various noises (input confirmation sounds, sounds produced by a pen contacting the touch panel, etc.) due to entry operations are picked up by the microphone and mixed into telephone conversations, making it difficult to hold clearly audible conversations.
In view of the disadvantages and deficiencies of the prior art devices described above, it is an object of the present invention to provide a communication terminal device which prevents noises due to data entry operations, such as pen-based entries, from being mixed in telephone conversations and hence permits clearly audible telephone conversations to be held.
SUMMARY OF THE INVENTION
According to the present invention, there is provided a communication terminal device comprising means for inputting data based on manual operations; voice input means; noise canceling means for canceling noise components other than voice components from a sound signal picked up by said voice input means, said noise components being generated by manual operations of said data inputting means; and means for transmitting a sound signal which has noise components canceled by said noise canceling means.
According to the present invention, noise components generated in response to input operations in the pen- or key-based data inputting means are canceled from a voice signal input from the voice input means and the resulting voice signal free from noises is then transmitted. Thus, since an input confirmation beeping sound, a pen impact pipping sound caused by impact of the pen onto the touch panel, and a pen frictional crackling sound caused by friction between the pen and the touch panel are canceled, telephone conversations will not be interrupted.
Additional objects and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention.
The objects and advantages of the present invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate presently preferred embodiments of the present invention and, together with the general description given above and the detailed description of the preferred embodiments given below, serve to explain the principles of the present invention in which:
FIG. 1 is a front view of a communication terminal device in accordance with a first embodiment of the present invention;
FIG.
REFERENCES:
patent: 5590206 (1996-12-01), An et al.
"Mounting Microphone Arrays on Computer and Television Displays"; Aug. 1995; pp. 107-108; IBM Technical Disclosure Bulletin, vol. 38, No. 8.
Casio Computer Co. Ltd.
Lee Ping
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