dtv: Update ITU-T J.83B transmitter block documentation.

Author: drmpeg

gr-dtv/include/gnuradio/dtv/catv_frame_sync_enc_bb.h

@@ -29,11 +29,11 @@ namespace gr {
   namespace dtv {
 
     /*!
-     * \brief Frame Sync Encoder. Adds a 42-bit frame sync pattern with control word.
+     * \brief Frame Sync Encoder. Adds a 42-bit (64QAM) or 40-bit (256QAM) frame sync pattern with control word.
      * \ingroup dtv
      *
-     * Input: Scrambled FEC Frame packets of 60 * 128 7-bit symbols.\n
-     * Output: Scrambled FEC Frame packets of 60 * 128 7-bit symbols with 42-bit FSYNC word.
+     * Input: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols.\n
+     * Output: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols with 42-bit (64QAM) or 40-bit (256QAM) FSYNC word.
      */
     class DTV_API catv_frame_sync_enc_bb : virtual public gr::block
     {
@@ -43,6 +43,7 @@ namespace gr {
       /*!
        * \brief Create an ITU-T J.83B Frame Sync Encoder.
        *
+       * \param constellation 64QAM or 256QAM constellation. \n
        * \param ctrlword convolutional interleaver control word.
        */
       static sptr make(catv_constellation_t constellation, int ctrlword);

gr-dtv/include/gnuradio/dtv/catv_randomizer_bb.h

@@ -33,7 +33,7 @@ namespace gr {
      * \ingroup dtv
      *
      * Input: Interleaved MPEG-2 + RS parity bitstream packets of 128 7-bit symbols.\n
-     * Output: Scrambled FEC Frame packets of 60 * 128 7-bit symbols.
+     * Output: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols.
      */
     class DTV_API catv_randomizer_bb : virtual public gr::sync_block
     {
@@ -43,6 +43,7 @@ namespace gr {
       /*!
        * \brief Create an ITU-T J.83B randomizer.
        *
+       * \param constellation 64QAM or 256QAM constellation.
        */
       static sptr make(catv_constellation_t constellation);
     };

gr-dtv/include/gnuradio/dtv/catv_trellis_enc_bb.h

@@ -29,11 +29,11 @@ namespace gr {
   namespace dtv {
 
     /*!
-     * \brief Trellis Encoder. 14/15 code rate.
+     * \brief Trellis Encoder. 14/15 (64QAM) or 19/20 (256QAM) code rate.
      * \ingroup dtv
      *
-     * Input: Scrambled FEC Frame packets of 60 * 128 7-bit symbols with 42-bit FSYNC word.\n
-     * Output: Four 7-bit symbols (28 bits) Trellis encoded to 30 bits (14/15 code rate).
+     * Input: Scrambled FEC Frame packets of 60 * 128 (64QAM) or 88 * 128 (256QAM) 7-bit symbols with 42-bit (64QAM) or 40-bit (256QAM) FSYNC word.\n
+     * Output: Four 7-bit symbols (28 bits) Trellis encoded to 30 bits (64QAM, 14/15 code rate) or 38 data bits Trellis encoded to 40 bits (256QAM, 19/20 code rate).
      */
     class DTV_API catv_trellis_enc_bb : virtual public gr::block
     {
@@ -43,6 +43,7 @@ namespace gr {
       /*!
        * \brief Create an ITU-T J.83B Trellis Encoder.
        *
+       * \param constellation 64QAM or 256QAM constellation.
        */
       static sptr make(catv_constellation_t constellation);
     };