diff --git a/src/broadcast_tv/composite.c b/src/broadcast_tv/composite.c
new file mode 100644
index 0000000..40c2b22
--- /dev/null
+++ b/src/broadcast_tv/composite.c
@@ -0,0 +1,127 @@
+///////////////////////////////////////////////////////////////////////////////////
+//-------------------------------------------------------------------------------//
+//-------------------------------------------------------------------------------//
+//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
+//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
+//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
+//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
+//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
+//-------------------------------------------------------------------------------//
+//----------------------------------------------------- http://hxc2001.free.fr --//
+///////////////////////////////////////////////////////////////////////////////////
+// File : composite.c
+// Contains: Composite video signal generator
+//
+// This file is part of rf-tools.
+//
+// Written by: Jean-François DEL NERO
+//
+// Copyright (C) 2023 Jean-François DEL NERO
+//
+// You are free to do what you want with this code.
+// A credit is always appreciated if you use it into your product :)
+//
+// Change History (most recent first):
+///////////////////////////////////////////////////////////////////////////////////
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "composite.h"
+
+#define EQUALIZING_PULSE_LEN 2.35
+#define LINE_PULSE_LEN 4.7
+#define ASSERTED_LEVEL 10
+#define DEASSERTED_LEVEL 100
+
+// PAL timings
+pulses_state vertical_blanking[]=
+{
+	// First sequence of equalizing pulses
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+	// Sequence of synchronizing pulses (Line 1 count)
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, 27.3/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+	// Duration of second sequence of equalizing pulses
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+
+	// Lines (6 > 310)
+	{305, ASSERTED_LEVEL,   DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6   ,((COMPOSITE_LINE_PERIOD_US)/(double)1E6),0},
+
+	// First sequence of equalizing pulses
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+	// Sequence of synchronizing pulses (Line 1 count)
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, 27.3/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+	// Duration of second sequence of equalizing pulses
+	{  5, ASSERTED_LEVEL,   DEASSERTED_LEVEL, EQUALIZING_PULSE_LEN/(double)1E6  ,((COMPOSITE_LINE_PERIOD_US/2)/(double)1E6),0},
+
+	// -- end of line 318
+	{  1, DEASSERTED_LEVEL, DEASSERTED_LEVEL, 0 ,(COMPOSITE_LINE_PERIOD_US/2)/(double)1E6,0},
+
+	// Lines (319 > 622)
+	{304, ASSERTED_LEVEL,   DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6   ,(COMPOSITE_LINE_PERIOD_US)/(double)1E6,0},
+
+	// Line 623 - (half)
+	{  1, ASSERTED_LEVEL,   DEASSERTED_LEVEL, LINE_PULSE_LEN/(double)1E6   ,((COMPOSITE_LINE_PERIOD_US)/2)/(double)1E6,0},
+
+	// End
+	{  0, 0, 0, 0  ,0,0}
+};
+
+
+void init_composite(composite_state * state, int sample_rate, int x_res, int y_res)
+{
+	state->sample_period = (double)1 / (double)sample_rate;
+
+	state->buf_x_res = x_res;
+	state->buf_y_res = y_res;
+
+	state->video_buffer = malloc( x_res * y_res * sizeof(uint32_t) );
+	if(state->video_buffer)
+		memset(state->video_buffer,0,x_res * y_res * sizeof(uint32_t) );
+
+	state->step_index = 0;
+	state->cur_state_time = 0;
+}
+
+void gen_video_signal(composite_state * state, double * vid_signal, int buf_size)
+{
+	int i;
+	double value;
+
+	value = 0;
+	i = 0;
+	while(i < buf_size)
+	{
+		if( state->cur_state_time >= vertical_blanking[state->step_index].total_duration)
+		{
+			state->cur_state_time = 0;
+			state->repeat_cnt++;
+
+			if( state->repeat_cnt >= vertical_blanking[state->step_index].repeat )
+			{
+				state->repeat_cnt = 0;
+				state->step_index++;
+			}
+
+			if(!vertical_blanking[state->step_index].repeat)
+			{
+				state->step_index = 0;
+			}
+		}
+
+		if( state->cur_state_time >= vertical_blanking[state->step_index].first_duration )
+		{
+			value = vertical_blanking[state->step_index].end_val;
+		}
+		else
+		{
+			value = vertical_blanking[state->step_index].start_val;
+		}
+
+		vid_signal[i] = value;
+
+		state->cur_state_time += state->sample_period;
+		i++;
+	}
+}
diff --git a/src/broadcast_tv/composite.h b/src/broadcast_tv/composite.h
new file mode 100644
index 0000000..3a7dac1
--- /dev/null
+++ b/src/broadcast_tv/composite.h
@@ -0,0 +1,57 @@
+///////////////////////////////////////////////////////////////////////////////////
+//-------------------------------------------------------------------------------//
+//-------------------------------------------------------------------------------//
+//-----------H----H--X----X-----CCCCC----22222----0000-----0000------11----------//
+//----------H----H----X-X-----C--------------2---0----0---0----0--1--1-----------//
+//---------HHHHHH-----X------C----------22222---0----0---0----0-----1------------//
+//--------H----H----X--X----C----------2-------0----0---0----0-----1-------------//
+//-------H----H---X-----X---CCCCC-----222222----0000-----0000----1111------------//
+//-------------------------------------------------------------------------------//
+//----------------------------------------------------- http://hxc2001.free.fr --//
+///////////////////////////////////////////////////////////////////////////////////
+// File : composite.h
+// Contains: Composite video signal generator
+//
+// This file is part of rf-tools.
+//
+// Written by: Jean-François DEL NERO
+//
+// Copyright (C) 2023 Jean-François DEL NERO
+//
+// You are free to do what you want with this code.
+// A credit is always appreciated if you use it into your product :)
+//
+// Change History (most recent first):
+///////////////////////////////////////////////////////////////////////////////////
+
+#define COMPOSITE_LINE_PERIOD_US 64.0
+
+typedef struct composite_state_
+{
+	double sample_period;
+
+	int buf_x_res;
+	int buf_y_res;
+
+	uint32_t * video_buffer;
+
+	int step_index;
+	int repeat_cnt;
+
+	double cur_state_time;
+
+}composite_state;
+
+typedef struct pulses_state_
+{
+	int    repeat;
+	double start_val;
+	double end_val;
+	double first_duration;
+	double total_duration;
+	int    type;
+}pulses_state;
+
+
+void init_composite(composite_state * state, int sample_rate, int x_res, int y_res);
+void gen_video_signal(composite_state * state, double * vid_signal, int buf_size);