/**
 * Copyright 2015 CANAL+ Group
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
export interface ITTParameters {
    frameRate: number;
    subFrameRate: number;
    tickRate: number;
    spaceStyle: "default" | "preserve";
    cellResolution: {
        columns: number;
        rows: number;
    };
}
/**
 * Returns global parameters from a TTML Document
 * @param {Element} tt - <tt> node
 * @throws Error - Throws if the spacing style is invalid.
 * @returns {Object}
 */
export default function getParameters(tt: Element): ITTParameters;
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