Edit in JSFiddle

angular.module("app", []).controller("parentCtr",

function ($scope) {
    $scope.$on("Ctr1NameChange",

    function (event, msg) {
        console.log("parent", msg);
        $scope.$broadcast("Ctr1NameChangeFromParrent", msg);
    });
}).controller("childCtr1", function ($scope) {
    $scope.change = function (name) {
        console.log("childCtr1", name);
        $scope.$emit("Ctr1NameChange", name);
    };
}).controller("childCtr2", function ($scope) {
    $scope.$on("Ctr1NameChangeFromParrent",

    function (event, msg) {
        console.log("childCtr2", msg);
        $scope.ctr1Name = msg;
    });
});

<div ng-app="app" ng-controller="parentCtr">
    <div ng-controller="childCtr1">name :
        <input ng-model="name" type="text" ng-change="change(name);" />
    </div>
    <div ng-controller="childCtr2">Ctr1 name:
        <input ng-model="ctr1Name" />
    </div>
</div>