doc/rate_distortion.txt File Reference

Functions
A Quick Description Of Rate Distortion Theory We want to encode a picture or piece of music optimally What does optimally really mean It means that we want to get the best quality at a given filesize OR we want to get the smallest filesize at a given	quality (in practice, these 2 goals are usually the same). Solving this directly is not practical

Variables
A Quick Description Of Rate Distortion Theory We want to encode a	video
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But	first
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about	quality
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses	Commonly
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First	step

Function Documentation

quality()

A Quick Description Of Rate Distortion Theory We want to encode a picture or piece of music optimally What does optimally really mean It means that we want to get the best quality at a given filesize OR we want to get the smallest filesize at a given quality	(	in	practice,
		these 2 goals are usually the	same
	)

Variable Documentation

video

A Quick Description Of Rate Distortion Theory We want to encode a video

Examples

hw_decode.c, and vaapi_transcode.c.

Definition at line 3 of file rate_distortion.txt.

Referenced by decode_frame(), film_write_header(), init_video_stream(), main(), mkv_write_tracks(), open_input_file(), process_video_header_cmv(), process_video_header_mdec(), process_video_header_vp6(), read_header(), and xmv_fetch_video_packet().

first

trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But first

Definition at line 12 of file rate_distortion.txt.

Referenced by avs_decode_frame(), chr_planar_vscale(), constant_color(), decode_ham_plane32(), decode_spectrum(), decode_type2(), dfa_read_packet(), do_a_deblock_C(), doHorizLowPass_C(), doVertLowPass_TMPL(), enable_tracks(), ff_frame_thread_init(), ff_init_slice_from_src(), find_next_coarsecandidate(), get_jaccarddist(), get_l1dist(), get_matching_parameters(), gxf_packet(), hevc_decode_extradata(), init_thread(), intersection_word(), lookup_signatures(), lum_planar_vscale(), mov_write_trun_tag(), mpegts_write_section(), on2avc_decode_band_scales(), print_stats(), rdt_parse_sdp_line(), recheck_discard_flags(), rtsp_read_packet(), rv40_init_tables(), show_help_options(), symmetric_extension(), union_word(), and vaapi_encode_init_rate_control().

quality

trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about quality

Definition at line 12 of file rate_distortion.txt.

Referenced by codec_reinit(), decode(), encode_frame(), estimate_qp(), ff_mss34_gen_quant_mat(), ff_side_data_set_encoder_stats(), get_quant_quality(), lame_calc_attack_threshold(), libspeex_decode_init(), mimic_decode_frame(), mss3_decode_frame(), mss4_decode_frame(), pp_get_mode_by_name_and_quality(), reset_coders(), speex_decode_init(), sws_getGaussianVec(), vaapi_encode_init_quality(), and vtenc_create_encoder().

Commonly

trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses Commonly

Definition at line 14 of file rate_distortion.txt.

step

trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step

Definition at line 58 of file rate_distortion.txt.

Referenced by adpcm_agm_expand_nibble(), adpcm_compress_trellis(), adpcm_ima_alp_compress_sample(), adpcm_ima_alp_expand_nibble(), adpcm_ima_cunning_expand_nibble(), adpcm_ima_expand_nibble(), adpcm_ima_mtf_expand_nibble(), adpcm_ima_oki_expand_nibble(), adpcm_ima_qt_compress_sample(), adpcm_ima_qt_expand_nibble(), adpcm_ima_wav_expand_nibble(), adpcm_swf_decode(), av_read_image_line2(), av_write_image_line2(), blend_hline(), blend_hline16(), blend_vline(), blend_vline16(), block_matching_multi(), build_requant_tab(), build_vlc(), cdtoons_render_sprite(), check_hflip(), color_balance16(), color_balance8(), colorcontrast_slice16p(), colorcontrast_slice8p(), combine_fft(), compose2D(), compose2D2(), compress_texture(), convert_coeffs(), dc_test(), dec_gain(), decode_block(), decode_rle(), decode_subframe(), decode_unit(), decode_value(), decompose2D(), decompose2D2(), dirac_unpack_block_motion_data(), displace_packed(), do_a_deblock_C(), do_vertical_columns(), dpcm_decode_init(), drawline(), encode_residual_ch(), eval_lpcenv_2parts(), eval_lpcenv_or_interp(), extract_from_packed(), ff_avg_h264_chroma_mc4_mmi(), ff_find_last_ts(), ff_h264_loop_filter_strength_lasx(), ff_h264_loop_filter_strength_msa(), ff_hflip_init(), ff_hflip_init_x86(), ff_me_search_fss(), ff_me_search_ntss(), ff_me_search_tdls(), ff_me_search_tss(), ff_put_h264_chroma_mc4_mmi(), fic_idct(), filter(), filter_frame(), filter_rgb(), filter_slice(), filter_slice_alpha(), filter_slice_alpha16(), filter_slice_packed(), filter_slice_planar(), filter_slice_rgba16_packed(), filter_slice_rgba_packed(), fraps2_decode_plane(), get_colors(), graticule16_column(), graticule16_row(), graticule_column(), graticule_row(), h264_filter_mb_fast_internal(), horiz_slice_c(), iblend_hline(), iblend_hline16(), iblend_vline(), iblend_vline16(), idct2_1d(), idct_1d(), init_axis_color(), init_pass2(), inter_recon(), interpolate(), intra_recon(), is_mv_diff_gt_3(), iterate_frame(), lerp_colors(), lerp_colors16(), lowpass(), lowpass16(), lut_packed_16bits(), lut_packed_8bits(), make_sin_table(), mc_chroma_scaled(), mc_luma_scaled(), negate_packed16(), negate_packed8(), opencl_get_plane_format(), parse_lfe_16(), parse_lfe_24(), pnm_parse(), pretwiddle(), qpeg_decode_intra(), rate_control(), refine_colors(), request_frame(), rv30_weak_loop_filter(), rv40_loop_filter_strength(), rv40_strong_loop_filter(), rv40_weak_loop_filter(), sbr_qmf_synthesis(), temperature_slice16p(), temperature_slice8p(), twiddle(), txd_decode_frame(), update_volume(), vc1_loop_filter(), vibrance_slice16p(), vibrance_slice8p(), vorbis_residue_decode_internal(), xcorr_coeff(), yuv2rgb_full_1_c_template(), yuv2rgb_full_2_c_template(), and yuv2rgb_full_X_c_template().