
<PAGE>   1

                                                                   Exhibit 23.12

                       CONSENT OF INDEPENDENT ACCOUNTANTS


We hereby consent to the use in this Registration Statement on Amendment No. 1
to Form S-1 for Charter Communications, Inc. of our report dated February 13,
1998, relating to the financial statements of Amrac Clear View, a Limited
Partnership, as of December 31, 1997 and 1996 and for the three years in the
period ended December 31, 1997 which appear in such Registration Statement. We
also consent to the references to us under the headings "Experts" in such
Registration Statement.


/s/ Greenfield, Altman, Brown, Berger & Katz, P.C.


Canton, Massachusetts


September 2, 1999

