UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                          ALTIGEN COMMUNICATIONS, INC.
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                                (Name of Issuer)

                                  COMMON STOCK
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                         (Title of Class of Securities)

                                   021489 10 9
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                                 (CUSIP Number)

                                DECEMBER 31, 2004
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             (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

|_|   Rule 13d-1(b)

|_|   Rule 13d-1(c)

|_|   Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



CUSIP No.   021489 10 9
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1. Names of Reporting Persons. I.R.S. Identification Nos. of above persons
   (entities only).

   Gilbert Hu
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2. Check the Appropriate Box if a Member of a Group (See Instructions)

   (a)  |_|

   (b)  |_|
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3. SEC Use Only
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4. Citizenship or Place of Organization     United States
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                   5. Sole Voting Power 1,567,063 (includes 311,665 options
Number of             exercisable as of February 28, 2005).
Shares             -------------------------------------------------------------
Beneficially 
Owned by           6. Shared Voting Power 171,819
Each               -------------------------------------------------------------
Reporting    
Person With        7. Sole Dispositive Power 1,567,063 (includes 311,665 options
                   exercisable as of February 28, 2005).
                   -------------------------------------------------------------

                   8. Shared Dispositive Power 171,819
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9. Aggregate Amount Beneficially Owned by Each Reporting Person 1,738,882

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10. Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
    Instructions)
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11. Percent of Class Represented by Amount in Row (9) 11.7%

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12. Type of Reporting Person (See Instructions)

    IN

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Item 1.

       (a) Name of Issuer      ALTIGEN COMMUNICATIONS, INC.

       (b) Address of Issuer's Principal Executive Offices
                4555 Cushing Pkwy., Fremont, CA 94538

Item 2.

       (a) Name of Person Filing      Gilbert Hu

       (b) Address of Principal Business Office or, if none, Residence

                4555 Cushing Pkwy., Fremont, CA 94538

       (c) Citizenship      United States

       (d) Title of Class of Securities      Common Stock

       (e) CUSIP Number      021489 10 9

Item 3. If this statement is filed pursuant to ss.ss.240.13d-1(b) or
        240.13d-2(b) or (c), check whether the person filing is a:

       (a) |_|  Broker or dealer registered under section 15 of the Act
           (15 U.S.C. 78o).

       (b) |_|  Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

       (c) |_|  Insurance company as defined in section 3(a)(19) of the Act
           (15 U.S.C. 78c).

       (d) |_|  Investment company registered under section 8 of the Investment
           Company Act of 1940 (15 U.S.C. 80a-8).

       (e) |_|  An investment advisor in accordance with
           ss.240.13d-1(b)(1)(ii)(E);

       (f) |_|  An employee benefit plan or endowment fund in accordance with
           ss.240.13d-1(b)(1)(ii)(F);

       (g) |_|  A parent holding company or control person in accordance with
           ss.240.13d-1(b)(1)(ii)(G);

       (h) |_|  A savings associations as defined in Section 3(b) of the Federal
           Deposit Insurance Act (12 U.S.C. 1813);

       (i) |_|  A church plan that is excluded from the definition of an
           investment company under section 3(c)(14) of the Investment
           Company Act of 1940 (15 U.S.C. 80a-3);

       (j) |_|  Group, in accordance with ss.240.13d-1(b)(1)(ii)(J).

Item 4.    Ownership

Provide the following information regarding the aggregate number and percentage
of the class of securities of the issuer identified in Item 1.

       (a) Amount beneficially owed:    1,738,882

       (b) Percent of class:    11.7%

       (c) Number of shares as to which the person has:

           (i)   Sole power to vote or to direct the vote 1,567,063 (includes
                 311,665 options exercisable as of February 28, 2005).

           (ii)  Shared power to vote or to direct the vote 171,819

           (iii) Sole power to dispose or to direct the disposition of
                 1,567,063 (includes 311,665 options exercisable as of
                 February 28, 2005).



           (iv)  Shared power to dispose or to direct the disposition of 171,819

Item 5.  Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof
the reporting person has ceased to be the beneficial owner of more than five
percent of the class of securities, check the following  |_|.

Not applicable.

Item 6.  Ownership of More than Five Percent on Behalf of Another Person

Not applicable.

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company

Not applicable.

Item 8.  Identification and Classification of Members of the Group

Not applicable.

Item 9.  Notice of Dissolution of Group

Not applicable.

Item 10. Certification

Not applicable.

                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date: February 11, 2005


                                        /s/ Gilbert Hu
                                        ----------------------------------------
                                        Gilbert Hu

The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement; provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.

NOTE: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See ss.240.13d-7 for other
parties for whom copies are to be sent.

Attention: Intentional misstatements or omissions of fact constitute Federal
criminal violations (See 18 U.S.C. 1001)