Abstract:
A portable terminal includes an apparatus capable of providing a hearing aid service. The apparatus includes a sensor configured to measure a spatial tilt of the portable terminal. The apparatus also includes a controller that determines whether a left ear or a right ear is used for communication based on the measured spatial tilt of the portable terminal. An audio signal processor compensates an audio signal according to the characteristic of determined ear.

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) AND CLAIM OF PRIORITY 
     The present application is related to and claims the benefit under 35 U.S.C. §119(a) to a Korean patent application filed in the Korean Intellectual Property Office on Nov. 27, 2008 and assigned Ser. No. 10-2008-0119179, the entire disclosure of which is hereby incorporated by reference. 
     TECHNICAL FIELD OF THE INVENTION 
     The present invention relates to an apparatus having a hearing aid in a portable terminal for compensating a sound (voice) quality over a call. More particularly, the present invention relates to the apparatus that includes a hearing aid in the portable terminal for compensating the sound (voice) quality over a call conforming to hearing characteristics of a left ear and a right ear of a user. 
     BACKGROUND OF THE INVENTION 
     When the user uses a communication portable terminal, the sound (voice) quality of the communication terminal is very important. Herein, the communication portable terminal can be either a wire communication terminal or a wireless communication terminal. 
     The communication portable terminal compensates sound signals in an effective frequency band using an equalization technology according to the hearing characteristics of the user to improve a sound (such as a voice) quality performance. 
     However, in a conventional technology, compensation of the sound signals in the communication portable terminal does not consider the hearing characteristics of the left ear or the right ear of a user. 
     The user of the communication portable terminal has unique hearing characteristics according to the left ear or the right ear of a user. 
     Therefore, there is a need to provide a communication portable terminal to compensate sound (voice) signals according to the hearing characteristics of the left ear or the right ear of the user. 
     SUMMARY OF THE INVENTION 
     To address the above-discussed deficiencies of the conventional art, it is a primary aspect of the present invention is to address at least the above mentioned problems and/or disadvantages and to provide at least the advantages described below. 
     Accordingly, an aspect of the present invention is to provide an apparatus for determining which ear is used for communication for improving the sound (voice) signals in a portable terminal. 
     Another aspect of the present invention is to provide a method for determining which ear is used for communication for improving the sound (voice) signals in a portable terminal. 
     According to one aspect of the present invention, a portable terminal that provides a hearing aid service includes a sensor that measures a spatial tilt of the portable terminal, a controller that determines whether a left or a right ear is used for communication based on the measured spatial tilt of the portable terminal, and an audio signal processor that compensates an audio signal according to the characteristic of determined ear. 
     According to another aspect of the present invention, a method for providing a hearing aid service in a portable terminal includes measuring a spatial tilt of the portable terminal, determining whether a left or a right ear is used for communication based on the measured spatial tilt of the portable terminal, and compensating an audio signal according to the characteristic of determined ear. 
     Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention. 
     Before undertaking the DETAILED DESCRIPTION OF THE INVENTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like; and the term “controller” means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
         FIGS. 1A through 1C  illustrate an ear which a user uses in a communication according to an exemplary embodiment of the present invention, and 
         FIG. 2  illustrates a functional block diagram of a portable terminal according to an exemplary embodiment of the present invention. 
     
    
    
     Throughout the drawings, like reference numerals will be understood to refer to like parts, components and structures. 
     DETAILED DESCRIPTION OF THE INVENTION 
       FIGS. 1A through 2 , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged wireless communication system. 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the present invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness. 
     Exemplary embodiments of the present invention provide a technique for compensating a sound (such as a voice) sound quality according to a hearing characteristic of ear that user uses for sound (voice). 
       FIGS. 1A through 1C  illustrate an ear that a user uses in a communication according to an exemplary embodiment of the present invention. 
       FIG. 1A  illustrates a portable terminal that is used with a left ear.  FIG. 1B  illustrates a portable terminal that determines which ear the user receives sound (voice) signals.  FIG. 1C  illustrates a portable terminal that is used with a right ear. 
     The portable terminal determines which ear is used in communication with the portable terminal using a portable terminal tilt. 
     For example, measuring of tilting of a straight line between a speaker and a microphone in the portable terminal determines which ear is used in communication with the portable terminal. That is, the location of the position of the portable terminal is used to determining the use of ear by the user. 
     If &lt;b&gt; is higher than &lt;a&gt; as illustrated in Fig. A, it is determined that the left ear is used for the portable terminal communication. Also, if &lt;a&gt; is higher than &lt;b&gt; as illustrated in Fig. C, it is determined that the right ear is used for the portable terminal communication. 
     Here, the portable terminal measures tilting of the portable terminal, that is tilting of the straight line between the speaker and the microphone in the portable terminal is measured using a geomagnetism sensor or a gradient sensor. 
     There are many other ways to identify of the position of the portable terminal with respect to the use of the ears of the user. 
       FIG. 2  illustrates a functional block diagram of a portable terminal according to an exemplary embodiment of the present invention. 
     The portable terminal of  FIG. 2  includes a Geomagnetism sensor  110 , a controller  120 , a storage unit  130 , an input unit  140 , a RF (Radio Frequency) processor  150 , an audio signal processor  160  and a speaker  170 . 
     The Geomagnetism sensor  110  measures spatial tilt of the portable terminal. 
     For example, the Geomagnetism sensor  110  measures a tilting of a reference line that is orthogonal to a straight line between the speaker  170  and a microphone (not shown). The measured tilting of the reference line is spatial tilt of the portable terminal. Here, the microphone is positioned to make a center line between the top portion and the bottom portion of the portable terminal. 
     For another example, the Geomagnetism sensor  110  measures earth magnetism of observation point and measures tilting direction (position) of corresponding point using the measured earth magnetism. 
     The Geomagnetism sensor  110  in the portable terminal includes a drive signal generator  111 , a 2-axis flux gate  113  and a signal processor  115 . 
     The drive signal generator  111  includes a drive pulse generation circuit and a current amplification circuit for driving a coil. 
     The drive pulse generation circuit generates a drive pulse that drives the 2-axis flux gate  113 . 
     The drive pulse generation switches the drive pulse selectively. 
     Thereafter, the drive pulse generation circuit transmits the switched drive pulse to the current amplification circuit. 
     The current amplification circuit includes a plurality of amplifiers and phase reversers. The current amplification circuit generates a pulse signal and a reverse pulse signal using the drive pulse output from the drive pulse generation circuit. Herein, the phase of the pulse signal and the reverse pulse signal is opposite. 
     The 2-axis flux gate  113  drives an X-axis flux gate and a Y-axis flux gate using the pulse signal and the reverse pulse signal. 
     The 2-axis flux gate  113  detects an electrical signal that corresponds to an electromotive force which is generated by X-axis flux gate and a Y-axis flux gate. 
     The signal processor  115  includes a chopping circuit, a first amplifier, a low frequency filter, a second amplifier and an ADC (Analog/Digital Converter). 
     The chopping circuit chops the electrical signal output from the 2-axis flux gate  113  using a plurality of switches. 
     The switches in the chopping circuit are controlled by the electrical signal output from the 2-axis flux gate  113 . 
     The first amplifier differentially amplifies the electrical signal output from the chopping circuit. 
     The low frequency filter filters the amplified signal in a predetermined band. 
     The second amplifier amplifies the filtered signal to create final signals. 
     The ADC converts the amplified signal in the second amplifier to digital voltage values. 
     Then, the controller  120  determines which ear is used in the portable terminal communication based on the tilting of the portable terminal as measured by the Geomagnetism sensor  110 . 
     The storage unit  130  stores a profile data. Herein, the profile data includes hearing characteristics of the left ear and the right ear of the user. 
     The input unit  140  provides profile data corresponding to input of the user to the controller  120 . 
     The RF processor  150  converts the RF signal received via an antenna to a baseband signal. 
     The audio signal processor  160  decodes the baseband signal output from the RF processor  150  and extracts an audio signal. Since, the audio signal processor  160  transmits the extracted audio signal to the speaker  170 . 
     As described above, the controller  120  determines position of the portable terminal with respect to ears of the user. In other words, the controller  120  determines which ear is used for the portable terminal communication by the user. 
     Since, the controller  120  controls the audio signal processor  160  to compensate audio signals according the stored profile data in the storage unit  130 . At this point, the audio signal processor  160  compensates the audio signals according to the stored profile data of the user in the storage unit  130  and transmits the compensated audio signals to the speaker  170 . 
     As described above, the portable terminal compensates sound (voice) signals according to the hearing characteristic of the ear being used in communication, and therefore it provides an improved portable terminal for communication. 
     Although the present disclosure has been described with an exemplary embodiment, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.