OMB APPROVAL
OMB Number 3235-0145 Expires: December 31, 2005 Estimated average burden hours per response ..... 11

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

SCHEDULE 13G/A

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No.17)*

Sigma Designs, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

82656 10 3

(CUSIP Number)

December 31, 2004
(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)

[X] 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. 82656 10 3                   13G                     Page 2 of 5 Pages

--------------------------------------------------------------------------------

    1       NAME OF REPORTING PERSON
            I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY)

            Thinh Q. Tran
--------------------------------------------------------------------------------

    2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
           (a) [ ]
           (b) [ ]

--------------------------------------------------------------------------------
    3       SEC USE ONLY


--------------------------------------------------------------------------------

    4       CITIZENSHIP OR PLACE OF ORGANIZATION

            United States of America
--------------------------------------------------------------------------------

                           5      SOLE VOTING POWER
      NUMBER OF                   1,375,426**
        SHARES     -------------------------------------------------------------
     BENEFICIALLY
       OWNED BY            6      SHARED VOTING POWER
         EACH                     0
      REPORTING    -------------------------------------------------------------
        PERSON             7      SOLE DISPOSITIVE POWER
         WITH
                                  1,375,426**
                   -------------------------------------------------------------
                           8      SHARED DISPOSITIVE POWER

                                  0
--------------------------------------------------------------------------------
    9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

           1,375,426**
--------------------------------------------------------------------------------
   10      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES
           (SEE INSTRUCTIONS)

--------------------------------------------------------------------------------
   11      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

           6.14%
--------------------------------------------------------------------------------
   12      TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

           IN
--------------------------------------------------------------------------------
**Includes 936,133 shares underlying stock options exercisable within 60 days
of December 31, 2004.

CUSIP No. 82656 10 3                   13G                     Page 3 of 5 Pages

--------------------------------------------------------------------------------

ITEM 1.

(a)      Name of Issuer:

         Sigma Designs, Inc.

(b)      Address of Issuer's Principal Executive Offices:

         1221 California Circle
         Milpitas, California 95035

ITEM 2.

(a)      Name of Person Filing:

         Thinh Q. Tran

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

         c/o Sigma Designs, Inc.
         1221 California Circle
         Milpitas, California 95035

(c)      Citizenship:

         United States of America

(d)      Title of Class of Securities:

         Common Stock

(e)      CUSIP Number:

         82656 10 3

CUSIP No. 82656 10 3                   13G                     Page 4 of 5 Pages

--------------------------------------------------------------------------------

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:

             Not applicable.

ITEM 4.      OWNERSHIP.

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

(a)      Amount beneficially owned: 1,375,426**

(b)      Percent of class:  6.14%

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

         (i)      Sole power to vote or to direct the vote: 1,375,426**

         (ii)     Shared power to vote or to direct the vote:  None

         (iii)    Sole power to dispose or to direct the disposition of:
                  1,375,426**

         (iv)     Shared power to dispose or to direct the disposition of:  None
** Includes 936,133 shares underlying stock options exerciable within 60 days
of December 31,2004.

ITEM 5.      OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

             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.

CUSIP No. 82656 10 3                   13G                     Page 5 of 5 Pages

--------------------------------------------------------------------------------

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.


Dated:  Febuary 9, 2005


                                        Thinh Tran


                                        By: /s/ Thinh Q. Tran
                                            ----------------------------------
                                            Name:  Thinh Q. Tran
                                            Title: President
                                                   and Chief Executive Officer

TRAN THINH Q SC 13G/A