High ratio number sequence compress

integer-compress.js

function pad(num,size) {
	var s = "000000000" + num;
	return s.substr(s.length-size);
}

var bitLength = 2; //Size of each number
var headType  = 8; //Min integer in bytes will write in head for index.

function bit(val){

	var min    = Math.min.apply(Math, val);
	var head   = parseInt(headType/min*4);
	var output = pad((head).toString(2),3);

	for(x=0;x<val.length;x++){
		output += pad((val[x] - min).toString(2),bitLength);
	}

	return output;
}

function solve(val,length){
	var res = headType/parseInt(val.substr(0, 3),2)*4;
	var num = [];

	for(i=0;i<length;i++){
		num[i] = res+parseInt(val.substr(3+i*bitLength, bitLength),2);
	}
		
	return num;
}

console.log(bit([11, 12, 11, 10, 8, 10, 9, 10, 10]));
console.log(solve(bit([11, 12, 11, 10, 8, 10, 9, 10, 10]),9));