@@ -192,9 +192,9 @@ int ff_ac3_bit_alloc_calc_mask(AC3BitAllocParameters *s, int16_t *band_psd,

     if (dba_mode == DBA_REUSE || dba_mode == DBA_NEW) {

         int i, seg, delta;

-        if (dba_nsegs >= 8)

+        if (dba_nsegs > 8)

             return -1;

-        band = 0;

+        band = band_start;

         for (seg = 0; seg < dba_nsegs; seg++) {

             band += dba_offsets[seg];

             if (band >= AC3_CRITICAL_BANDS || dba_lengths[seg] > AC3_CRITICAL_BANDS-band)

@@ -1173,8 +1173,8 @@ static int decode_audio_block(AC3DecodeContext *s, int blk)

         /* channel delta offset, len and bit allocation */

         for (ch = !cpl_in_use; ch <= fbw_channels; ch++) {

             if (s->dba_mode[ch] == DBA_NEW) {

-                s->dba_nsegs[ch] = get_bits(gbc, 3);

-                for (seg = 0; seg <= s->dba_nsegs[ch]; seg++) {

+                s->dba_nsegs[ch] = get_bits(gbc, 3) + 1;

+                for (seg = 0; seg < s->dba_nsegs[ch]; seg++) {

                     s->dba_offsets[ch][seg] = get_bits(gbc, 5);

                     s->dba_lengths[ch][seg] = get_bits(gbc, 4);

                     s->dba_values[ch][seg] = get_bits(gbc, 3);